PRADHAN , Bibhuti B. Six Sigma: Literature Review Analysis. International Journal of Psychosocial Rehabilitation, [S. l.], v. 24, n. 6, p. 696–701, 2019. DOI: 10.61841/vf0r5c48. Disponível em: https://psychosocial.com/index.php/ijpr/article/view/6452. Acesso em: 29 sep. 2025.