2477-9199 2477-9199 S2477-91992016000200096 10.26807/cav.v0i01.23 Ecuador 00 06 2016 00 06 2016 1 96 102

2011 2010 15 2 2 357-76 2010 2015 2005 16 16 2010 2007 2010 47-58 2009 21 151-64 1998 1 1 5-30 2014 16 0111-25 2010 16 4 4 93-115