Távora, Vladimir de Araújo, et al. “Systematic Review of the Flabellidae Family (Scleractinia) of the Pirabas Formation (Lower Miocene), Pará State, Brazil”. Anuário Do Instituto De Geociências, vol. 38, no. 1, Feb. 2017, pp. 128-36, doi:10.11137/2015_1_128_136.