1405-3322 1405-3322 S1405-33222006000200253 10.18268/bsgm2006v58n2a8 Mexico 00 00 2006 00 00 2006 58 2 253 257

2001 2003 2004 Santiago de Cuba, Cuba 2003 2000 1995 1995 139-66 1997 205-15 2001 Guadalajara, Jal., México 1996 24 399-402 1993 20 1483-6 1995 129-38