1729-8091 1729-8091 S1729-80912021000100102 Ecuador 00 03 2021 00 03 2021 21 74 102 111

2003 6 6 2016 2005 58 58 2012 151 2017 2004 24 24 2001 1 2017 9 2017 24 1 1 35-8 2016 12 6 6 315-25