GU, Chong. Smoothing Spline ANOVA Models: R Package gss. Journal of Statistical Software, [S. l.], v. 58, n. 5, p. 1–25, 2014. DOI: 10.18637/jss.v058.i05. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v058i05. Acesso em: 2 apr. 2025.