Pongpullponsak A, Suracherkeiti W, Intaramo R. The Comparison of Efficiency of Control Chart by Weighted Variance Method, Scaled Weighted Variance Method, Empirical Quantiles Method and Extreme-value Theory for Skewed Populations. Thail. Stat. [internet]. 2015 May 28 [cited 2026 Sep. 29];5:1-23. available from: https://ph02.tci-thaijo.org/index.php/thaistat/article/view/34344