1870-199X 1870-199X S1870-199X2015000300170 10.1016/j.rodmex.2015.07.003 Mexico Mexico 00 09 2015 00 09 2015 19 3 170 173

2004 20 45-50 2002 24 430-8 2002 18 454-62 2002 14 107-14 2002 24 23-8 2005 30 105-12 1993 9 306-11 1996 10 128-32 1996 12 44-51 2002 33 17-21 1995 8 187-90 2002 24 423-9 1999 81 610-5 1996 21 71-6 1994 10 37-44 1996 9 19-21 2000 83 194-203 1997 13 208-13