CHOI, S. W.; GIBBONS, L. E.; CRANE, P. K. lordif: An R Package for Detecting Differential Item Functioning Using Iterative Hybrid Ordinal Logistic Regression/Item Response Theory and Monte Carlo Simulations. Journal of Statistical Software, [S. l.], v. 39, n. 8, p. 1–30, 2011. DOI: 10.18637/jss.v039.i08. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v039i08. Acesso em: 29 jan. 2022.