@article{trofino_coutinho_barbosa_2005,  title={Improved H2 and H<FONT FACE=Symbol>¥</FONT> conditions for robust analysis and control synthesis of linear systems},  volume={16},  ISSN={0103-1759},  url={https://doi.org/10.1590/S0103-17592005000400004},  DOI={10.1590/S0103-17592005000400004},  number={4},  journal={Sba: Controle & Automação Sociedade Brasileira de Automatica},  publisher={Sociedade Brasileira de Automática},  author={Trofino, Alexandre and Coutinho, Daniel F. and Barbosa, Karina A.},  year={2005},  month={Oct},  pages={427–434} }