Pattarapanitchai, P., Budsaba, K., Loc Hung, T. and Volodin, A. (2022) “On the Normal Approximation for Some Special Estimators of the Ratio of Binomial Proportions”, Thailand Statistician, 20(4), pp. 779–790. available at: https://ph02.tci-thaijo.org/index.php/thaistat/article/view/247460 (accessed: 15 September 2026).