@article{westphalen_maciel_1999,  title={Pinch analysis based on rigorous physical properties},  volume={16},  ISSN={0104-6632},  url={https://doi.org/10.1590/S0104-66321999000300006},  DOI={10.1590/S0104-66321999000300006},  number={3},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={WESTPHALEN, D. L. and MACIEL, M.R .WOLF},  year={1999},  month={Sep},  pages={279–284} }