COOMBES, K. R.; BROCK, G.; ABRAMS, Z. B.; ABRUZZO, L. V. Polychrome: Creating and Assessing Qualitative Palettes with Many Colors. Journal of Statistical Software, Code Snippets, [S. l.], v. 90, n. 1, p. 1–23, 2019. DOI: 10.18637/jss.v090.c01. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v090c01. Acesso em: 25 apr. 2024.