COUTINHO, José Moacyr Vianna; HACHIRO, Jorge. Distribution, mineralogy, petrography, provenance and significance of Permian ash-carrying deposits in the Paraná Basin . Geologia USP. Série Científica, São Paulo, Brasil, v. 5, n. 1, p. 29–39, 2005. DOI: 10.5327/S1519-874X2005000100003. Disponível em: https://revistas.usp.br/guspsc/article/view/27405.. Acesso em: 15 maio. 2024.