0120-1263 0120-1263 S0120-12632019000100026 10.18566/escr.v27n58.a02 Colombia 00 06 2019 00 06 2019 27 58 26 48

1965 2001 2005 2001 1977 1972 2011 2014 51-140 1978 9 221-43 2007 79 5-30 2003 1975 7 131-93 1981 2009 2016 1980 1986 491-528 2009 4 2003