0121-7550 0121-7550 S0121-75502019000200273 10.30578/nomadas.n51a18 Colombia 00 12 2019 00 12 2019 51 273 275 1 2015 2 1996 31 35/37 35/37 2411-23 3 2017 4 2010 5 2006 6 2017 7 2014 231-55 8 2018 9 2018