1990-8644 1990-8644 S1990-86442022000300118 Ecuador 00 06 2022 00 06 2022 18 86 118 124

2016 2018 10 2 2 221-7 2018 XXIII 82 82 2016 31 54 54 9-36 2016 XXVI 5 5 300-5 2015 2 2 2 105-15 2015 30 909-19 2019 9 17 17 127-43 2017 2016 37 2 2 151-63