CARO, D. H.; BIECEK, P. intsvy: An R Package for Analyzing International Large-Scale Assessment Data. Journal of Statistical Software, [S. l.], v. 81, n. 7, p. 1–44, 2017. DOI: 10.18637/jss.v081.i07. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v081i07. Acesso em: 8 aug. 2022.