@article{rodrigues_aguiar_aguiar_santa maria_2007,  title={Quaternization reaction of 2-vinylpyridine and 4-vinylpyridine network copolymers for 4-nitrophenol adsorption},  volume={18},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532007000200028},  DOI={10.1590/S0103-50532007000200028},  number={2},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Rodrigues, Adriana S. S. and Aguiar, Alcino P. de and Aguiar, Mônica R. M. P. de and Santa Maria, Luiz Claudio de},  year={2007},  month={Mar},  pages={431–436} }