@article{ricardi-branco_arai_rösler_2002, title={Megaspores from coals of the Triunfo Member, Rio Bonito Formation (Lower Permian), northeastern Paraná State, Brazil}, volume={74}, ISSN={0001-3765}, url={https://doi.org/10.1590/S0001-37652002000300011}, DOI={10.1590/S0001-37652002000300011}, number={3}, journal={Anais da Academia Brasileira de Ciências}, publisher={Academia Brasileira de Ciências}, author={RICARDI-BRANCO, FRESIA and ARAI, MITSURU and RÖSLER, OSCAR}, year={2002}, month={Sept}, pages={491–503} }