0185-1276 0185-1276 S0185-12762017000100325 10.22201/iie.18703062e.2017.1.2597 Chile 00 06 2017 00 06 2017 39 110 325 330 2012 35 5 5 874-85 2011 35 5 5 1047-50 2001 1955 1999 2013 1 1 33-9 1906 1990 1960 1997