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http://repositorio.unemi.edu.ec//handle/123456789/3653
http://repositorio.unemi.edu.ec//handle/123456789/5797
http://repositorio.unemi.edu.ec//handle/123456789/5009
http://repositorio.unemi.edu.ec//handle/123456789/414
http://repositorio.unemi.edu.ec//handle/123456789/1411
http://repositorio.unemi.edu.ec//handle/123456789/4686
http://repositorio.unemi.edu.ec//handle/123456789/5923
http://repositorio.unemi.edu.ec//handle/123456789/4393
http://repositorio.unemi.edu.ec//handle/123456789/1829
http://repositorio.unemi.edu.ec//handle/123456789/5942