0034-7531 0034-7531 S0034-75312021000400017 Cuba Cuba 00 12 2021 00 12 2021 93 4

1 2017 88 1 2 2017 139 232 3 2017 4 2016 4 1 1 38-59 5 2016 63 3 6 2014 140 1177 7 2018 73 2122-36 8 2017 13 2 9 2015 81 5 10 2017 5 8 11 2015 22 1