2550-6722 2550-6722 S2550-67222020000200121 10.37135/chk.002.11.09 Colombia 00 08 2020 00 08 2020 11 121 134

1987 1972 6 153 153 2008 2019 1 1 1 107-19 2012 2005 1990 6 35-9 1985 2001 2006 1995 12 235-63 1971 2005