Wang, W., & Jin, K. A generalized model with internal restrictions on item difficulty for polytomous items.

Wang, Wen-Chung., و Kuan-Yu Jin. A Generalized Model With Internal Restrictions On Item Difficulty for Polytomous Items.

Wang, Wen-Chung., و Kuan-Yu Jin. A Generalized Model With Internal Restrictions On Item Difficulty for Polytomous Items.