@article{souza_marques-toigo_2005,  title={Progress on the palynostratigraphy of the Permian strata in Rio Grande do Sul State, Paraná Basin, Brazil},  volume={77},  ISSN={0001-3765},  url={https://doi.org/10.1590/S0001-37652005000200012},  DOI={10.1590/S0001-37652005000200012},  number={2},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={Souza, Paulo A. and Marques-Toigo, Marleni},  year={2005},  month={Jun},  pages={353–365} }