Surathanee, Sutipon, and Saengla Chaimongkol. 2015. “The Functionality of a Hierarchical Generalized Linear Model Used for Detecting Differential Item Functioning With a Fisher-Tippett Ability Distribution”. Thailand Statistician 6 (1):65-74. https://ph02.tci-thaijo.org/index.php/thaistat/article/view/34340.