2007-8064 2007-8064 S2007-80642021000100020 10.22201/enesl.20078064e.2021.23.79250 Mexico Spain 00 12 2021 00 12 2021 9 23

1980 40 955-9 2018 2005 17 32 32 107-44 2009 2002 5 2019 2003 2019 2019 51-74 Escuela Nacional de Estudios Superiores Universidad Nacional Autónoma de México 2018 2019 2015 47 135-48 2016 2017 2008 13 2 2 267-91 2018 2015 191 2605-8 2016 40 53-66 2014 2015 97 133-63 2011 2015 9 18 18 124-39 2018 2005 3 1 1 637-64 2019 1987 2010 2016 UNAM 2011 UNAM-Becas 2018 2015 33 1 1 13-26 2015 32 77-86