0121-8530 0121-8530 S0121-85302019000100179 10.19053/01218530.n34.2019.9543 Colombia 00 06 2019 00 06 2019 34 179 190

2014 2004 2007 1952 1968 1953 1960 2000 2017 2014 2015 2004 2012 56 56 53-65 2002 2011 2017