@article{delbem_valera_valenzuela-diaz_demarquette_2010,  title={Modification of a Brazilian smectite clay with different quaternary ammonium salts},  volume={33},  ISSN={0100-4042},  url={https://doi.org/10.1590/S0100-40422010000200015},  DOI={10.1590/S0100-40422010000200015},  number={2},  journal={Química Nova},  publisher={Sociedade Brasileira de Química},  author={Delbem, Maria Flávia and Valera, Ticiane S. and Valenzuela-Diaz, Francisco R. and Demarquette, Nicole R.},  year={2010},  pages={309–315} }