0012-7353 0012-7353 S0012-73532018000400227 10.15446/dyna.v85n207.69197 Colombia 00 12 2018 00 12 2018 85 207 227 235

[1] 2005 29 4 4 311-36 [2] 1988 38 3 3 453-4 [3] 1985 35 2 2 145-57 [4] 1983 33 1 1 67-72 [5] 1972 114 6 6 417-22 [6] 2012 [7] 1997 47 3 3 407-37 [8] 1977 27 1 1 13-30 [9] 1972 12 1 1 17-36 [10] 1992 42 2 2 303-47 [11] 2002 52 10 10 727-49 [12] 2014 9 2 2 299-312 [13] 1965 91 4 4 85-106 [14] 2000 26 2 2 83-103 [15] 1978 15 4 4 592-5 [16] 1999 39 4 4 93-109 [17] 1992 [18] 1977 27 4 4 557-91 [19] 1996 [20] 1999 [21] 1989 39 1 1 125-40 [22] 2012 [23] 2004 54 4 4 269-78 [24] 1996 1 3 3 251-71 [25] 2002 [26] 1997 2 4 4 279-99 [27] 2016 11 6 6 1263-85 [28] 2017 341-62 [29] 2006 [30] 2015 169-87