@article{trevisan_mei_zanin_2000,  title={Preparation of silica with controlled pore sizes for enzyme immobilization},  volume={17},  ISSN={0104-6632},  url={https://doi.org/10.1590/S0104-66322000000100006},  DOI={10.1590/S0104-66322000000100006},  number={1},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Trevisan, H.C. and Mei, L.H.I. and Zanin, G.M.},  year={2000},  month={Mar},  pages={71–77} }