2413-4341 2413-4341 S2413-43412021000200066 10.18004/rpr/2021.07.02.66 Paraguay 00 12 2021 00 12 2021 7 2 66 67 2018 22 12 12 1132-41 2003 74 1 1 9-33 2018 41 1 1 91-8