2218-3620 2218-3620 S2218-36202023000400268 Ecuador 00 08 2023 00 08 2023 15 4 268 273

2009 196 1 1 1-20 2011 190 1 1 339-58 2014 1 2 2 183-97 2019 2018 12 1 1 96-118 2018 104 104 5-12 2004 e.7 2018 2013 14e. 2021 2021 2019 21 1 1 241-56 2020 2016 32 138 138 4-13 1996 2019 2019 20 1 1 60-82 2007 2020 20 26 26 Universidad Nacional Autónoma de México UNAM 2021