Mendes, Anderson Conceição, and Werner Truckenbrodt. “Provenance of Albian Sandstones (Itapecuru Group), Eastern Border of São Luís-Grajaú Basin, Maranhão, Using Heavy Mineral Analysis and Mineral Chemistry”. Boletim Do Museu Paraense Emílio Goeldi - Ciências Naturais, vol. 4, no. 1, Apr. 2009, pp. 57-74, https://doi.org/10.46357/bcnaturais.v4i1.671.