2631-2786 2631-2786 S2631-27862020000100055 10.35290/rcui.v7n1.2020.161 Ecuador Ecuador Ecuador Ecuador 00 04 2020 00 04 2020 7 1 55 62

2015 26 1 1 2014 2017 2012 32 1 1 2015 1 1 1 75-84 2012 1 54 54 2008 3 3 9-12