1990-8644 1990-8644 S1990-86442020000400266 Cuba 00 08 2020 00 08 2020 16 75 266 271

2013 2017 2013 9 2 2 427-34 2015 15 3 3 1-29 2004 1997 1989 2009 2017 15 2 2 153-81 2013 11 311-41 2016 2001 2016 1998