0120-1263 0120-1263 S0120-12632017000200513 10.18566/escr.v25n55.a08 Colombia Colombia 00 12 2017 00 12 2017 25 55 513 528

2016 2016 2005 77-82 2005 47-9 2005 83-94 1869 1986 2007 2005 301-13 2005 189-201 1988 2006