SABTU, S. H. .; MATORE, M. E. E. M. .; MAAT, S. M. . Real-World Application: Six Sigma Quality Tools for Continuous Performance Improvement in Specific Educational Practices - A Systematic Review. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 22, n. 9, p. 401–422, 2023. Disponível em: http://ijlter.net/index.php/ijlter/article/view/1749. Acesso em: 1 jan. 2026.