VERVLOET, M.; KIERS, H. A. L.; VAN DEN NOORTGATE, W.; CEULEMANS, E. PCovR: An R Package for Principal Covariates Regression. Journal of Statistical Software, [S. l.], v. 65, n. 8, p. 1–14, 2015. DOI: 10.18637/jss.v065.i08. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v065i08. Acesso em: 4 dec. 2022.