Murauskas, Gediminas, and Marijus Radavičius. “Analysis of Student Achievements Using Ordered Logistic Regression”. Lietuvos matematikos rinkinys 51, no. proc. LMS (December 21, 2010): 408–413. Accessed May 4, 2024. https://www.journals.vu.lt/LMR/article/view/17862.