Surathanee, S., and S. Chaimongkol. “The Functionality of a Hierarchical Generalized Linear Model Used for Detecting Differential Item Functioning With a Fisher-Tippett Ability Distribution”. Thailand Statistician, vol. 6, no. 1, May 2015, pp. 65-74, https://ph02.tci-thaijo.org/index.php/thaistat/article/view/34340.