2448-9190 2448-9190 S2448-91902018000400424 10.29262/ram.v65i4.342 Mexico Mexico Mexico 00 12 2018 00 12 2018 65 4 424 430

1 2009 2 2006 22 1 1 11-9 3 2000 5 4 4 238-49 4 2000 5 5 255-69 5 1999 0 0 6-11 6 2003 7 2002 31 4 4 204-12 8 1994 23 5 5 205-8 9 1999 5 5 196-205 10 2001 4 4 4 247-56 11 1999 88 2 2 187-95 12 2004 10 3 3 173-8 13 1997 26 4 4 170-5 14 2001 109 5 5 361-4 15 1990 19 9 9 389-96 16 2013 57 57 178-84 17 2005 141 1 1 23-5 18 1997 2 2 643-60 19 2001 30 3 3 135-40 20 2002 31 1 1 23-7