1727-897X 1727-897X S1727-897X2021000200274 Cuba 00 04 2021 00 04 2021 19 2 274 279

1 2002 78 924 924 2 2019 3 2012 4 2002 78 924 924 5 2002 6 2017 23 4 4 7 2019 8 2016 7 1 1