V. de A. Távora, B. L. P. de Souza, and I. de L. A. Nogueira Neto, “Micropaleontology of the Reef Facies of the Pirabas Formation (Lower Miocene), Pará State, Brazil”, Anu. Inst. Geociênc., vol. 37, no. 2, pp. 100–110, Feb. 2017.