@article{buisman1993,
  title={Department of Computer Science},
  author={Hylke Buisman and Manuel Gomez-rodriguez and Saeed Hassanpour},
  year={1993},
  journal={Journal of Computational and Applied Mathematics},
  doi={10.1016/0377-0427(93)90083-n},
  url={https://doi.org/10.1016/0377-0427(93)90083-n}
}