POOLE, Keith T.; LEWIS, Jeffrey B.; ROSENTHAL, Howard; LO, James; CARROLL, Royce. Recovering a Basic Space from Issue Scales in R. Journal of Statistical Software, [S. l.], v. 69, n. 7, p. 1–21, 2016. DOI: 10.18637/jss.v069.i07. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v069i07. Acesso em: 30 mar. 2025.