1684-1859 1684-1859 S1684-18592021000200009 Ecuador 00 12 2021 00 12 2021 13 2

1 2018 2 PUCE 2021 3 UCACUE 2021 4 UCUENCA 2021 5 2018 6 2014 7 2021 3 4 4 9-20 8 2012 223-34 9 2017 37-48 10 2017 11 2020