ÜNLÜ, A.; KIEFER, T.; DZHAFAROV, E. N. Fechnerian Scaling in R: The Package fechner. Journal of Statistical Software, [S. l.], v. 31, n. 6, p. 1–24, 2009. DOI: 10.18637/jss.v031.i06. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v031i06. Acesso em: 30 jun. 2024.