George, Ann Cathrice, Alexander Robitzsch, Thomas Kiefer, Jürgen Groß, and Ali Ünlü. “The R Package CDM for Cognitive Diagnosis Models”. Journal of Statistical Software 74, no. 2 (October 20, 2016): 1–24. Accessed March 29, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v074i02.