1390-6712 1390-6712 S1390-67122018000100020 10.24133/maskay.v8i1.590 Ecuador 00 05 2018 00 05 2018 8 1 20 26

2006 2nd 2017 2004 2nd 17-26 2007 2017 2017 2013 2017 2016 2017 2017 1993 Volume I 1st