A counterexample to the existence of a Poisson structure on a twisted group algebra. São Paulo Journal of Mathematical Sciences, [S. l.], v. 3, n. 1, p. 109–113, 2009. DOI: 10.11606/issn.2316-9028.v3i1p109-113. Disponível em: https://periodicos.usp.br/spjournal/article/view/40.. Acesso em: 8 abr. 2025.