2616-7964 2616-7964 S2616-79642021000300753 10.33996/revistahorizontes.v5i19.235 Ecuador 00 09 2021 00 09 2021 5 19 753 774

2018 40 4 4 2014 42 2 2 209-24 2019 2019 2da 2016 2019 2017 2020 27 27 135-53 2013 2019