2594-066X 2594-066X S2594-066X2019000200031 10.22201/cieg.2594066xe.2019.58.02 Chile 00 00 2019 00 00 2019 58 31 52

2010 145-62 2012 2 19-31 2010 2007 1987 2013 1987 1987 1990 2008 8 58-66 1987 39-52 1989 2013