0121-2494 0121-2494 S0121-24942017000200023 Colombia 00 12 2017 00 12 2017 47 23 30

1960 1988 1984 1993 1984 2002 2006 2007 2003 2006 1998 2001 1998 2005 1984 2012 1958 2008 157-77 2011 197-220 2011 93-152 2012