2072-8174 2072-8174 S2072-81742019000200102 10.18004/rdn2019.0011.02.102-108 Cuba 00 12 2019 00 12 2019 11 2 102 108

1 2012 36 2 2 25-7 2 2015 57 1 1 35-43 3 2009 85 2 2 110-3 4 2010 121-42 5 2018 339-65 6 2005 4 5ta 68-73 7 2005 78 6 6 385-7 8 2011 15 2 2 296-302