@article{dórea_2004,  title={Self-bounded (A,B)-invariant polyhedra and constant reference tracking in constrained linear systems},  volume={15},  ISSN={0103-1759},  url={https://doi.org/10.1590/S0103-17592004000100003},  DOI={10.1590/S0103-17592004000100003},  number={1},  journal={Sba: Controle & Automação Sociedade Brasileira de Automatica},  publisher={Sociedade Brasileira de Automática},  author={Dórea, Carlos E. T.},  year={2004},  month={Jan},  pages={10–16} }