CHUTIMAN, N.; KUMPHON, B. Ratio Estimator Using Two Auxiliary Variables for Adaptive Cluster Sampling. Thailand Statistician, [S. l.], v. 6, n. 2, p. 241–256, 2015. Disponível em: https://ph02.tci-thaijo.org/index.php/thaistat/article/view/34339. Acesso em: 6 may. 2024.