2477-9199 2477-9199 S2477-91992021000200133 10.26807/cav.vi12.438 Ecuador 00 11 2021 00 11 2021 12 133 150

2014 1973 2010 55 55 159-81 2015 2019 1962 2014 6 6 1-22 2014 2007 1994 2012 2003 2016 44 44 3-19 2016 2019 1998 2011 2018 2012 2018