2218-3620 2218-3620 S2218-36202021000200228 Cuba Ecuador Cuba 00 04 2021 00 04 2021 13 2 228 241

2017 1999 2010 2018 18 19 19 165-80 2007 222 222 9-20 2008 2001 2005 2019 65 3 3 1-23 International Organization for Standardization 2015 2018 63 3 3 1-21 2020 I 2006 2017 38 43 43 3-15