1409-3871 1409-3871 S1409-38712021000100045 10.15517/lank.v21i1.46803 Puerto Rico USA 00 04 2021 00 04 2021 21 1 45 50

1995 73 1-203 2014 109 1-625 2020 65 65-68. 1977 1 2 2 39-54 1978 1 3 3 49-63 1993 9 231-40 2018 186 273-303 1992 37 13-9