2307-0420 2307-0420 S2307-04202018000200038 10.18004/sopaci.2018.agosto.38-39 Paraguay 00 08 2018 00 08 2018 42 2 38 39

1 2006 6 1-2 1-2 17-32 2 2012 12 3 3 183-97 3 2016 263 5 5 908-17 4 2012 27 3 3 5 2010 2 9 9 345-53 6 2008 136 517-27