1870-3925 1870-3925 S1870-39252018000300004 10.22198/rys.2018.73.a909 Mexico México 00 12 2018 00 12 2018 30 73

2013 2007 201-25 2008 2015 253-62 CFE 2013 CFE CFE 2014 2015 199-204 2012 EDUCA, A. C. 2013 2014 2000 367-404 2010 2009 2009 2011 2007 2004 1972 13-72 2006 150-7 2013 2008 XI 22 22 29-43 1994 2014 2009 2015 263-8 2010