0012-7353 0012-7353 S0012-73532020000300121 10.15446/dyna.v87n214.82733 Colombia 00 09 2020 00 09 2020 87 214 121 128

[1] 1997 [2] 1998 [3] 1977 [4] 1984 [5] 1981 [6] 1982 [7] 1996 [8] 2008 60 31-8 [9] 2019 11 2 2 9-30 [10] 1990 [11] 2000 [12] 1969 [13] 1995 [14] 1979 [15] 1989 [16] 1965 [17] 1981 [18] 1980 [19] 1963