2077-2955 2077-2955 S2077-29552019000100052 Ecuador 00 04 2019 00 04 2019 15 1 52 62

2007 2009 2001 2017 16 3 3 93-101 2018 17 2 2 81-90 2008 2017 21 2 2 73-81 2012 16 10 10 760-8