1990-8644 1990-8644 S1990-86442019000500109 Ecuador 00 10 2019 00 10 2019 15 70 109 119

1994 I 2016 9 18 18 2011 11 11 123-74 2010 2009 1993 1997 2011 2012 1986 1998 17I 3 3 1998 17 3 3 1995 12 180-97 1989 2010 6 6 1-37 1965 2001 II 1750 2015