0301-7036 0301-7036 S0301-70362022000100097 10.22201/iiec.20078951e.2022.208.69712 Ecuador Ecuador Ecuador 00 03 2022 00 03 2022 53 208 97 123

1972 1 3-4 3-4 2010 31 4 4 2006 2018 2014 2017 9 2 2 2014 30 4 4 2009 2011 79 3 3 2013 105 8 8