1990-8644 1990-8644 S1990-86442019000500384 Colombia 00 10 2019 00 10 2019 15 70 384 391

1965 2010 1997 2012 1993 11 2 2 197-212 2004 10 3 3 307-16 2004 1999 15 1 1 1996 1986 2004