Soikliew, Kotchaporn, and Autcha Araveeporn. 2018. “Modifications of Levene’s and O’Brien’s Tests for Testing the Homogeneity of Variance Based on Median and Trimmed Mean”. Thailand Statistician 16 (2):106-28. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/135555.