WICKELMAIER, F.; STROBL, C.; ZEILEIS, A. Psychoco: Psychometric Computing in R. Journal of Statistical Software, [S. l.], v. 48, n. 1, p. 1–5, 2012. DOI: 10.18637/jss.v048.i01. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v048i01. Acesso em: 17 aug. 2022.