3

article
Published in 2015
Repository Repositorio Universidad Técnica de Machala
9

article
Published in 2015
Repository Repositorio Universidad Técnica de Machala
12

article
Published in 2015
Repository Repositorio Universidad Técnica de Machala
13

15

16

article
Published in 2014
Repository Repositorio Universidad Andina Simón Bolivar
17

article
Published in 2016
Repository Repositorio Universidad Andina Simón Bolivar
18

article
Published in 2011
Repository Repositorio Universidad Andina Simón Bolivar
20

article
Published in 2007
Repository Repositorio Universidad Andina Simón Bolivar