0122-5383 0122-5383 S0122-53832018000200089 10.29047/01225383.85 Colombia 00 12 2018 00 12 2018 8 2 89 98

[1] 1984 49 3 3 1259-66 [2] 2006 167 2 2 495-503 [3] 2017 5-9 [4] 1989 45 1-3 1-3 503-28 [5] 2001 [6] 2008 34 5 5 259-66 [7] 2011 18-23 [8] 2016 81 5 5 197-209 [9] 2007 19 1-20 [10] 2012 4-9 [11] 2010 17-22