2954-4122 2954-4122 S2954-41222021000400040 10.31157/an.v26i4.303 Mexico Mexico Ecuador Mexico 00 12 2021 00 12 2021 26 4 40 42

1 2014 34 1 1 92-4 2 2015 92 12 12 425-30 3 2019 112 8 8 623-4 4 2011 183 18 18 2135