Olsbjerg M, Christensen KB. %lrasch_mml: A SAS Macro for Marginal Maximum Likelihood Estimation in Longitudinal Polytomous Rasch Models. J. Stat. Soft. [Internet]. 2015 Oct. 7 [cited 2024 Apr. 25];67(2):1-24. Available from: https://www.jstatsoft.org/index.php/jss/article/view/v067c02