2448-9190 2448-9190 S2448-91902018000400422 10.29262/ram.v65i4.554 Ecuador Ecuador Argentina Ecuador 00 12 2018 00 12 2018 65 4 422 423 1 2018 65 3 3 250-8 2 3 2017 4 2013 93 93 156-60 5 2016 116 6 6 554-8 6 2005 Cuarta edición