1607-050X 1607-050X S1607-050X2019000200204 10.29340/60.2100 Mexico 00 08 2019 00 08 2019 60 204 209 1997 1999 175-97 2003 2006 2006 1996 2015 51-66 1991 51 51 7-54 2017 11-57 2003 2011 1997 26 26 33-58 2006 2016