2218-3620 2218-3620 S2218-36202021000500345 Ecuador 00 10 2021 00 10 2021 13 5 345 354

2017 8 307-19 2019 21 2 2 422-48 2020 E32 E32 427-40 2012 7 7 36-55 International Organization for Standardization 2013 2015 60 2 2 486-506 2017 2001 Red Nacional de Investigación y Educación del Ecuador 2014 2013 16 30 30 91-109