Kunzmann, L.; Mohr, B. A. R.; Bernardes-de-Oliveira, M. E. C. (2009). Cearania heterophylla gen. nov. et sp. nov., a fossil gymnosperm with affinities to the Gnetales from the Early Cretaceous of northern Gondwana. Review of Palaeobotany and Palynology. 158(1-2): 193-212.