@article{méndez_lisbôa_coutinho_otani_2006,  title={Activated petroleum coke for natural gas storage},  volume={17},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532006000600011},  DOI={10.1590/S0103-50532006000600011},  number={6},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Méndez, Manoel O. A. and Lisbôa, Antonio C. L. and Coutinho, Aparecido R. and Otani, Choyou},  year={2006},  month={Sep},  pages={1144–1150} }