1390-0129 1390-0129 S1390-01292021000300043 10.33333/rp.vol48n1.04 Ecuador Ecuador Ecuador 00 10 2021 00 10 2021 48 1 43 50

2005 CORPAIRE 2014 2015 EPA 2014 IDAE 2017 ISO 50001 2018 OMS 2018 2011 12 3 3 63-70 TESTO AG. 2007 2008 2008