0187-5337 0187-5337 S0187-53372021000200075 10.24875/per.19000020 México México México México 00 08 2021 00 08 2021 35 2 75 77

1 1987 59 443-7 2 1830 1 247-51 3 1997 11 293-7 4 1998 81 195-201 5 2001 670-lp674 6 1978 40 681-9 7 1993 68 128-33