1990-8644 1990-8644 S1990-86442020000100074 Ecuador 00 02 2020 00 02 2020 16 72 74 82

2013 Cambridge University Press 2018 2008 1996 125 150-95 1997 1996 2007 8 1-2 1-2 159-76 2001 2017 2014 2004 1994 3 50 50 65-84 1994 14 149-57 2005 2017 1973