KRISHNA IYER, P.; BHATTACHARYA, M. The comparative efficiency of the X and R Charts and L-S chart for statistical quality control. Defence Science Journal, [S. l.], v. 4, n. 2, p. 55–66, 2013. DOI: 10.14429/dsj.4.3702. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/3702. Acesso em: 16 jun. 2025.