0034-8376 0034-8376 S0034-83762021000300129 10.24875/ric.20000415 Mexico Mexico Ecuador Mexico Mexico 00 06 2021 00 06 2021 73 3 129 131 1 2018 57 1344-50 2 2018 9 1222 3 2019 139 241-4 4 1984 83 18-25 5 2006 50 83-6