@article{maculan_plateau_lisser_2003,  title={Integer linear models with a polynomial number of variables and constraints for some classical combinatorial optimization problems},  volume={23},  ISSN={0101-7438},  url={https://doi.org/10.1590/S0101-74382003000100012},  DOI={10.1590/S0101-74382003000100012},  number={1},  journal={Pesquisa Operacional},  publisher={Sociedade Brasileira de Pesquisa Operacional},  author={Maculan, Nelson and Plateau, Gérard and Lisser, Abdel},  year={2003},  month={Jan},  pages={161–168} }