Publicado: 2016-09-01

DOI: https://doi.org/10.18272/oi.v2i2.749
DOI: https://doi.org/10.18272/oi.v2i2.751
DOI: https://doi.org/10.18272/oi.v2i2.752
DOI: https://doi.org/10.18272/oi.v2i2.753