@article{monteiro_da cruz_2008,  title={Simple answers to usual questions about unusual forms of the Evans' root locus plot},  volume={19},  ISSN={0103-1759},  url={https://doi.org/10.1590/S0103-17592008000400007},  DOI={10.1590/S0103-17592008000400007},  number={4},  journal={Sba: Controle & Automação Sociedade Brasileira de Automatica},  publisher={Sociedade Brasileira de Automática},  author={Monteiro, L.H.A. and Da Cruz, J.J.},  year={2008},  month={Dec},  pages={444–449} }