GRÖMPING, U. R Package FrF2 for Creating and Analyzing Fractional Factorial 2-Level Designs. Journal of Statistical Software, [S. l.], v. 56, n. 1, p. 1–56, 2014. DOI: 10.18637/jss.v056.i01. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v056i01. Acesso em: 21 feb. 2024.