0300-9041 0300-9041 S0300-90412018000900584 10.24245/gom.v86i9.2253 México México 00 00 2018 00 00 2018 86 9 584 589

1 2017 2 016 3 4 1993 114 3 3 564-70 5 6 1992 75 3 3 178-83 7 8 9 1982 60 1 1 25-9 10 2016 11 2017 12