Hernández, A. y González-Romá, V. (2003) «Evaluating the Multiple-Group Mean and Covariance Structure Analysis model for the detection of Differential Item Functioning in polytomous ordered items», Psicothema, 15(Número 2), pp. 322–327. Disponible en: http://156.35.33.188/index.php/PST/article/view/8126 (Accedido: 17 septiembre 2026).