1.
Mair P, Hatzinger R. Extended Rasch Modeling: The eRm Package for the Application of IRT Models in R. J. Stat. Soft. [Internet]. 2007 Feb. 22 [cited 2024 Nov. 21];20(9):1-20. Available from: https://www.jstatsoft.org/index.php/jss/article/view/v020i09