1727-897X 1727-897X S1727-897X2020000400733 Cuba Cuba 00 08 2020 00 08 2020 18 4 733 736

1 2018 29 10 2 2015 41 ^s1 ^s1 1 22 3 2015 41 ^s1 ^s1 1 4 2017 43 4 4 10 5 2015 7 2 2 40 6 2016 30 1 1 48 7 2015 41 ^s1 ^s1 1 8 2017 13 2 2 26