2218-3620 2218-3620 S2218-36202018000200139 República del Ecuador 00 02 2018 00 02 2018 10 2 139 144

2002 2017 2001 1996 2013 19 2 2 379-89 2014 2 1 1 2008 2003 2013 2 4 4 18-32 2012 33 93-124