2007-7890 2007-7890 S2007-78902021000600062 10.46377/dilemas.v8i.2817 Ecuador Ecuador Ecuador 00 00 2021 00 00 2021 8 spe4

1. 2003 14 4 4 135-47 2. 2020 4 1 1 250-5 3. 2019 1 49-58 4. 2019 5. 2006 24 4 4 1-9 6. 2019 7. 2011 27 3 3 239-47 8. 2018 13 1 1 86-9