Karadavut, Tuğba, Allan Cohen, and Seock-Ho Kim. “Mixture Rasch Model With Main and Interaction Effects of Covariates on Latent Class Membership”. International Journal of Assessment Tools in Education 6, no. 3 (July 17, 2019): 362–377. Accessed November 20, 2019. http://ijate.net/index.php/ijate/article/view/693.