@article{fontes_gomes_oliveira_souza_sousa_2004,  title={Niobium carbide synthesis by solid-gas reaction using a rotating cylinder reactor},  volume={21},  ISSN={0104-6632},  url={https://doi.org/10.1590/S0104-66322004000300004},  DOI={10.1590/S0104-66322004000300004},  number={3},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Fontes, F. A. O. and Gomes, K. K. P. and Oliveira, S. A. and Souza, C. P. and Sousa, J. F.},  year={2004},  month={Jul},  pages={393–403} }