In memory of Vladimir Shelkovich (1949-2013). São Paulo Journal of Mathematical Sciences, [S. l.], v. 7, n. 2, p. 193–200, 2013. DOI: 10.11606/issn.2316-9028.v7i2p193-200. Disponível em: https://www.revistas.usp.br/spjournal/article/view/88605.. Acesso em: 27 abr. 2024.