Pattarapanitchai, Parichart, Kamon Budsaba, Tran Loc Hung, and Andrei Volodin. 2022. “On the Normal Approximation for Some Special Estimators of the Ratio of Binomial Proportions”. Thailand Statistician 20 (4):779-90. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/247460.