Magis, David, and Juan Ramon Barrada. “Computerized Adaptive Testing With R: Recent Updates of the Package CatR”. Journal of Statistical Software, Code Snippets 76, no. 1 (January 11, 2017): 1–19. Accessed April 25, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v076c01.