1982-9949 1982-9949 S1982-99492016000100255 10.17058/rea.v24i1.6787 00 04 2016 00 04 2016 24 1 255 272

9 1 1 77-85 17 47 47 859-71 39 461-87 10 10 121-36 44 261-97