0188-7017 0188-7017 S0188-70172021000100121 10.24275/uam/izt/dcsh/alt/2021v31n61/oseguera Mexico 00 06 2021 00 06 2021 31 61 121 124 2001 2007 2000 1968 1993 2016 1999 1995 1968 1985 1999 1994 2010 1988 1980 2005