2631-2875 2631-2875 S2631-28752020000300018 10.29166/catedra.v3i3.2430 Ecuador Ecuador 00 12 2020 00 12 2020 3 3 18 32

2005 2004 1975 Vol. 1 2000 2009 2007 2011 1995 2007 1971 2011 14 3 457-74 2011 1985 Vol. 10 2003 2017 2013 15 2 65-93 2017 2007