1990-8644 1990-8644 S1990-86442019000300297 Ecuador 00 09 2019 00 09 2019 15 68 297 307

2006 3 2 2 5-19 2004 2005 2005 36 1 1 Ecuador. Universidad Laica Eloy Alfaro de Manabí 2014 2003 65-672 2008 2011 2006 20 20 20 1-24 2008 7 7 7 63-81 2001 2007 2011 7 1 1 86-105 2006 18 46 46 11-24 2006 Camaguey 2004 2005 14 50-7 2007 2 3 3 45-6