0186-2391 0186-2391 S0186-23912017000600394 10.18233/apm38no6pp394-4011507 Mexico Mexico Mexico Mexico Mexico Mexico 00 00 2017 00 00 2017 38 6 394 401

1 2012 17 183-4 2 1997 35 278-97 3 1993 2nd 273-91 4 1987 9 121-9 5 1979 133 157-9 6 2003 41 7-9 7 2013 12 143-9 8 2010 55 95-9 9 2003 25 348-1 10 2002 117 513-24 11 2006 47 268-72 12 2006 13 256-62 13 1996 88 24-31 14 1989 63 1904-11 15 1997 90 1799-806 16 1992 97 584-90 17 2006 23 98-101 18 2002 69 201-5