@article{pal_datta_paul_2013,  title={Hexavalent chromium reduction by immobilized cells of Bacillus sphaericus AND 303},  volume={56},  ISSN={1516-8913},  url={https://doi.org/10.1590/S1516-89132013000300019},  DOI={10.1590/S1516-89132013000300019},  number={3},  journal={Brazilian Archives of Biology and Technology},  publisher={Instituto de Tecnologia do Paraná - Tecpar},  author={Pal, Arundhati and Datta, Sudeshna and Paul, Amal K.},  year={2013},  month={May},  pages={505–512} }