Wickelmaier, Florian, Carolin Strobl, and Achim Zeileis. “Psychoco: Psychometric Computing in R”. Journal of Statistical Software 48, no. 1 (May 24, 2012): 1–5. Accessed March 29, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v048i01.