SAGBI bases for the Kernel of certain locally nilpotent K-derivations on polynomial rings. São Paulo Journal of Mathematical Sciences, [S. l.], v. 4, n. 2, p. 177–187, 2010. DOI: 10.11606/issn.2316-9028.v4i2p177-187. Disponível em: https://revistas.usp.br/spjournal/article/view/53.. Acesso em: 18 abr. 2025.