0188-6649 0188-6649 S0188-66492023000300345 10.21555/top.v670.2280 Ecuador 00 12 2023 00 12 2023 67 345 368

2010 1991 1-164 1992 1-66 1992 65-98 2010 63-136 2001 236 1978 293-311 1983 1985 1996 2002 2004 2006 2006 2010 1969 1981 2013 2017 2005 2018