Zambrano, E. R. N., Oliveira, O. M. C. de, & Ribeiro, H. J. P. S. (2017). Geochemical characterization with paleoenvironment clues of shales from Pimenteiras Formation, Tocantins State, Parnaíba Basin, Brazil. Geologia USP. Série Científica, 17(3), 67-78. https://doi.org/10.11606/issn.2316-9095.v17-395