0120-0283 0120-0283 S0120-02832019000100133 10.18273/revbol.v41nl-2019007 Colombia Colombia 00 04 2019 00 04 2019 41 1 133 149

1985 2012 1986 1988 40 9 9 1203-10 1992 31 9 9 48-56 1991 2003 1997 12 4 4 221-6 2015 13 1 1 57-63 2017 2008 2 4 4 13-31 2015 2004 Houston, USA 1987 39 8 8 885-98 2003