0035-0052 0035-0052 S0035-00522019000400159 México México 00 08 2019 00 08 2019 86 4 159 161

1 1999 50 4 4 405-7 2 2000 83 3 3 F171-6 3 1994 55 2 2 111-5 4 2007 22 1 1 85-8 5 1990 57 5 5 261-78