@article{rippel_bragança_2009,  title={Borracha natural e nanocompósitos com argila},  volume={32},  ISSN={0100-4042},  url={https://doi.org/10.1590/S0100-40422009000300024},  DOI={10.1590/S0100-40422009000300024},  number={3},  journal={Química Nova},  publisher={Sociedade Brasileira de Química},  author={Rippel, Márcia Maria and Bragança, Fábio do Carmo},  year={2009},  pages={818–826} }