2631-2786 2631-2786 S2631-27862021000400121 10.35290/rcui.v8n1e.2021.512 Ecuador Ecuador Ecuador 00 12 2021 00 12 2021 8 121 132

2018 7 14 14 63-85 2013 36 y 37 36 y 37 117-33 2021 2010 1 2 2 55 2021 21 2 2 521-46 2018 1st 2021 45 1 1 398-417 2021 26 1 1 19-39 2016 34 34 357-80 2019 7 14 14 199-214 2015 39 85 85 115-37 2020 23-7 2021 1-14