1990-8644 1990-8644 S1990-86442020000400299 Ecuador 00 08 2020 00 08 2020 16 75 299 306

2015 9 26 26 18-23 2002 2002 2015 9 2 2 77-88 2016 2015 35 11 11 41-4 2015 39 87-106 2017 1984 2005 3-16 2016 19 1 1 191-9 2015 3 2 2 75-7 2011 29 2 2 447-65 2010 16 21-32 2010 56 5-6 5-6 591-612 2016 21 68 68 167-90 Universidad de Deusto 2007 2015 136 136 3-18