NOOR-UL-AMIN, M. .; RAZA, A. . Regression-in-Ratio Estimators for Population Mean by Using Robust Regression in Two Phase Sampling. Journal of Reliability and Statistical Studies, [S. l.], v. 14, n. 02, p. 527–540, 2021. DOI: 10.13052/jrss0974-8024.1427. Disponível em: https://journals.riverpublishers.com/index.php/JRSS/article/view/20341. Acesso em: 12 may. 2026.