<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2019000500519</article-id>
<article-id pub-id-type="doi">10.31349/revmexfis.65.519</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Asymptotically equivalent functions and ultrafilters applied to noncommutative quantum cosmology]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Astorga-Moreno]]></surname>
<given-names><![CDATA[J.A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mena-Barboza]]></surname>
<given-names><![CDATA[E.A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Aspeitia]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de la Ciénega Módulo de Investigación y Tutorías]]></institution>
<addr-line><![CDATA[Ocotlán Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Zacatecas Unidad Académica de Física ]]></institution>
<addr-line><![CDATA[Zacatecas ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Consejo Nacional de Ciencia y Tecnología  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2019</year>
</pub-date>
<volume>65</volume>
<numero>5</numero>
<fpage>519</fpage>
<lpage>528</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2019000500519&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2019000500519&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2019000500519&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Using the semi-classical approximation to the Wheeler-DeWitt equation obtained via Arnowitt-Deser-Misner (ADM) formalism in the Friedmann-Lema&#523;tre-Robertson-Walker (FLRW) model coupled to a scalar field with positive cosmological constant in the Kantowski-Sachs (KS) Universe, we introduced a deformation on the commutation relation for the minisuperspace variables and find an explicit semiclassical expression equivalent, in an adequate limit, to the solution with the aid of asymptotically equal functions and the theory of Ultrafilters, offering a suggestive alternative to sketch the behavior of the dynamical system involved without the need to solve it numerically.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Mathematical methods]]></kwd>
<kwd lng="en"><![CDATA[asymptotically equivalent functions]]></kwd>
<kwd lng="en"><![CDATA[ultrafilters]]></kwd>
<kwd lng="en"><![CDATA[quantum cosmology]]></kwd>
<kwd lng="en"><![CDATA[02.30.Mv]]></kwd>
<kwd lng="en"><![CDATA[02.40.Pc]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ade]]></surname>
<given-names><![CDATA[P. A. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Astron. Astrophys]]></source>
<year>2016</year>
<volume>594</volume>
<page-range>A13</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lyth]]></surname>
<given-names><![CDATA[D. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Riotto]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rept.]]></source>
<year>1999</year>
<volume>314</volume>
<page-range>1</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schimdt]]></surname>
<given-names><![CDATA[B. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Astrophysical Journal]]></source>
<year>1998</year>
<volume>507</volume>
<page-range>46</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perlmutter]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Astrophysical Journal]]></source>
<year>1999</year>
<volume>517</volume>
<page-range>565</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Riess]]></surname>
<given-names><![CDATA[A. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Astronomical Journal]]></source>
<year>1998</year>
<volume>116</volume>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Witten]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Nucl. Phys.]]></source>
<year>1995</year>
<volume>B443</volume>
<page-range>85</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rovelli]]></surname>
<given-names><![CDATA[C,]]></given-names>
</name>
</person-group>
<source><![CDATA[Zakopane lectures on loop gravity]]></source>
<year>2011</year>
<conf-name><![CDATA[ 3rdQuantum Geometry aan Quantum Gravity School]]></conf-name>
<conf-loc>Zokopane, Poland </conf-loc>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Snyder]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev.]]></source>
<year>1947</year>
<volume>71</volume>
<page-range>38</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Connes]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Noncommutative Geometry Year 2000]]></source>
<year>2000</year>
</nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Connes]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Math Phys]]></source>
<year>2000</year>
<volume>41</volume>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Connes]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Douglas]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Schwarz]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. High Energy Physics]]></source>
<year>1998</year>
<volume>9802</volume>
<page-range>003</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Douglas]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Nekrasov]]></surname>
<given-names><![CDATA[N. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Rev. Mod. Phys.]]></source>
<year>2011</year>
<volume>73</volume>
<page-range>977</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Seiberg]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[E]]></surname>
<given-names><![CDATA[Witten]]></given-names>
</name>
</person-group>
<source><![CDATA[J. High Energy Physics]]></source>
<year>1998</year>
<volume>9909</volume>
<page-range>032</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vakili]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Khosravi]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Sepangi]]></surname>
<given-names><![CDATA[H. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Class. Quant. Grav.]]></source>
<year>2007</year>
<volume>24</volume>
<page-range>931</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García-Compeán]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Obregón]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramirez]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. D]]></source>
<year>2002</year>
<volume>88</volume>
</nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bastos]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Bertolami]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Dias]]></surname>
<given-names><![CDATA[N. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Prata]]></surname>
<given-names><![CDATA[J. N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Int. J. Mod, Phys A]]></source>
<year>2009</year>
<volume>24</volume>
<page-range>2741</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barbosa]]></surname>
<given-names><![CDATA[G. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Pinto-Neto]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. D]]></source>
<year>2004</year>
<volume>69</volume>
</nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gamboa]]></surname>
<given-names><![CDATA[C. R. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Loewe]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. D]]></source>
<year>2001</year>
<volume>64</volume>
</nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wald]]></surname>
<given-names><![CDATA[R. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. D]]></source>
<year>1983</year>
<volume>28</volume>
</nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wetterich]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Astron. Astrophys]]></source>
<year>1995</year>
<volume>301</volume>
<page-range>321</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[McCallum]]></surname>
<given-names><![CDATA[M. A. H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Commun. Math. Phys.]]></source>
<year>1971</year>
<volume>20</volume>
<page-range>57</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Billyard]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Coley]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ibañez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[arXiv:9807055v1]]></source>
<year>1998</year>
</nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ureña-López]]></surname>
<given-names><![CDATA[L. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Matos]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. D]]></source>
<year>2000</year>
<volume>62</volume>
</nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ginsburg]]></surname>
<given-names><![CDATA[V. S. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Pacific J. Math.]]></source>
<year>1975</year>
<volume>52</volume>
<page-range>403</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bernstein]]></surname>
<given-names><![CDATA[A. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Fund. Math.]]></source>
<year>1970</year>
<volume>66</volume>
<page-range>185</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García-Ferreira]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Sanchis]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Comment. Math. Univ. Carolin.]]></source>
<year>2007</year>
<volume>48</volume>
<page-range>465</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García-Ferreira]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodriguez-López]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Uzcátegui]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Topology and its applications]]></source>
<year>2016</year>
<volume>180</volume>
<page-range>100</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mena]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Obregón]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Sabido]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Int. J. Mod. Phys. D]]></source>
<year>2009</year>
<volume>18</volume>
<page-range>95</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bastos]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Bertolami]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Dias]]></surname>
<given-names><![CDATA[N. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Prata]]></surname>
<given-names><![CDATA[J. N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. D]]></source>
<year>2008</year>
<volume>78</volume>
</nlm-citation>
</ref>
<ref id="B30">
<label>30</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mezincescu]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Star Operation in Quantum Mechanics]]></source>
<year>2000</year>
</nlm-citation>
</ref>
<ref id="B31">
<label>31</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Misner]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Class. Quantum Grav]]></source>
<year>1972</year>
<publisher-loc><![CDATA[San Francisco ]]></publisher-loc>
<publisher-name><![CDATA[Freeman]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B32">
<label>32</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mena-Barboza]]></surname>
<given-names><![CDATA[E. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Escamilla-Herrera]]></surname>
<given-names><![CDATA[L. F.]]></given-names>
</name>
<name>
<surname><![CDATA[López-Domínguez]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Torres-Arenas]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Capistrano]]></surname>
<given-names><![CDATA[Abraao]]></given-names>
</name>
</person-group>
<source><![CDATA[Deformed Phase Space in Cosmology and Black Holes, Trends in Modern Cosmology]]></source>
<year>2017</year>
<publisher-name><![CDATA[InTech]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B33">
<label>33</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pérez-Payán]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Sabido]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Mena]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Yee-Romero]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Adv. High Energy Phys.]]></source>
<year>2014</year>
</nlm-citation>
</ref>
<ref id="B34">
<label>34</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barbosa]]></surname>
<given-names><![CDATA[G. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Pinto-Neto]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. D]]></source>
<year>2004</year>
<volume>70</volume>
</nlm-citation>
</ref>
<ref id="B35">
<label>35</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bielas]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Klimasara]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Król]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Acta Physica Polonica B]]></source>
<year>2015</year>
<volume>46</volume>
</nlm-citation>
</ref>
<ref id="B36">
<label>36</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Król]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Int. J. Theor. Phys.]]></source>
<year>2003</year>
<volume>42</volume>
<page-range>921</page-range></nlm-citation>
</ref>
<ref id="B37">
<label>37</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Banks]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Nucl. Phys. Rev.]]></source>
<year>1985</year>
<volume>B249</volume>
<page-range>332</page-range></nlm-citation>
</ref>
<ref id="B38">
<label>38</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[S. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Phys. Rev. D]]></source>
<year>1995</year>
<volume>52</volume>
</nlm-citation>
</ref>
<ref id="B39">
<label>39</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Comfort]]></surname>
<given-names><![CDATA[W. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Negrepontis]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[]]></source>
<year>1974</year>
<publisher-loc><![CDATA[Berlin ]]></publisher-loc>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
