2528-7907 2528-7907 S2528-79072018000200022 Ecuador Ecuador Ecuador Ecuador 00 06 2018 00 06 2018 1 22 22 29

2013 2014 2015 6-11 2014 2017 2014 402-10 2017 2010 Vol. I 2010 2017 2015 pag.26 2012 pag.10 2010 pag.13