1676-2592 1676-2592 S1676-25922020000400787 10.20396/etd.v22i4.8657761 Colombia Colombia Colombia 00 10 2020 00 10 2020 22 4 787 792 1985 15 15 1991 295 295 7-37 2000 19 19 195-203 2006 25 25 243-69 1999 193