@article{cremasco_wang_2003,  title={A design and study of the effects of selectivity on binary separation in a four-zone simulated moving bed for systems with linear isotherms},  volume={20},  ISSN={0104-6632},  url={https://doi.org/10.1590/S0104-66322003000200012},  DOI={10.1590/S0104-66322003000200012},  number={2},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Cremasco, M.A. and Wang, N.-H. Linda},  year={2003},  month={Apr},  pages={181–190} }