0185-1276 0185-1276 S0185-12762019000100203 10.22201/iie.18703062e.2019.114.2673 Mexico 00 00 2019 00 00 2019 41 114 203 210 1979 33 11 11 19 y 20 1982 1 1 1 71-2 2008 1971 3 3 77-9 1966