WEHRENS, R.; KRUISSELBRINK, J. Flexible Self-Organizing Maps in kohonen 3.0. Journal of Statistical Software, [S. l.], v. 87, n. 7, p. 1–18, 2018. DOI: 10.18637/jss.v087.i07. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v087i07. Acesso em: 18 jan. 2022.