2222-145X 2222-145X S2222-145X2019000100049 10.18004/rcfacen.2019.10.1.49 Paraguay Paraguay Paraguay 00 06 2019 00 06 2019 10 1 49 54

2010 7 2 2 2-5 2011 108 2015 51 1 1 81-107 1999 2016 22 1 1 1-20 2017 1994 2a 352