1390-7697 1390-7697 S1390-76972023000100070 10.26423/rctu.v10il.703 Ecuador 00 06 2023 00 06 2023 10 1 70 78

1 1 109-16 9 1 1 695-703 3 3 3 94-8 5 32 1 1 864-71 2014 315 1 1 47 1 1 1733-47 8 1 1 211-8 6 1 1 237-44