2011-7582 2011-7582 S2011-75822019000400318 10.30944/20117582.505 Colombia 00 12 2019 00 12 2019 34 4 318 319 1 2019 12 63 2 2019 32 115-20 3 2017 317 357-8 4 2016 154 405-20 5 2015 98 1172-9 6 2016 73 15-6