1657-6357 1657-6357 S1657-63572017000100107 Colombia 00 06 2017 00 06 2017 32 107 126

2015 1998 1990 20 20 42-56 2006 2014 76 4 4 1-14 2013 1990 1981 2003 2015 4 4 47-69 1999 1997 2015 2007 1968 1968 21-76 2007 2007 1998 116-51 2007 1988 2008