1727-897X 1727-897X S1727-897X2021000601033 Cuba 00 12 2021 00 12 2021 19 6 1033 1036

1 2018 2 2016 3 2006 ^s2 ^s2 2 4 2006 5 2015 3 2 2 6 2017 7 2015