N. MADU, P.; O. OLATAYO, T.; I. OGUNYINKA, P.; A. AYANLOWO, E.; S. ODEYEMI, A. Improved Ratio-Cum Regression Estimator Using Two Auxiliary Variables In Single Phase Sampling. IRAQI JOURNAL OF STATISTICAL SCIENCES, [S. l.], v. 21, n. 2, p. 80–91, 2025. Disponível em: https://rjps.uomosul.edu.iq/index.php/stats/article/view/21006. Acesso em: 3 aug. 2025.