JOHNSON, M. S. Marginal Maximum Likelihood Estimation of Item Response Models in R. Journal of Statistical Software, [S. l.], v. 20, n. 10, p. 1–24, 2007. DOI: 10.18637/jss.v020.i10. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v020i10. Acesso em: 24 apr. 2024.