YASSIN, Amal. The Comprehensive Quality in Health Services by Using Six Sigma. International Journal for Innovation Education and Research, Dhaka, Bangladesh, v. 7, n. 9, p. 83–103, 2019. DOI: 10.31686/ijier.vol7.iss9.1708. Disponível em: https://scholarsjournal.net/index.php/ijier/article/view/1708.. Acesso em: 8 may. 2024.