@article{oliveira_ramos_bretas_2012,  title={Calculation of parameter ranges for robust gain tuning of power system controllers},  volume={23},  ISSN={0103-1759},  url={https://doi.org/10.1590/S0103-17592012000300007},  DOI={10.1590/S0103-17592012000300007},  number={3},  journal={Sba: Controle & Automação Sociedade Brasileira de Automatica},  publisher={Sociedade Brasileira de Automática},  author={Oliveira, Ricardo Vasques de and Ramos, Rodrigo Andrade and Bretas, Newton Geraldo},  year={2012},  month={May},  pages={331–345} }