Ríos Bolívar, A., F. Hidrobo, and J. Suárez. “Robust Control by Extended Static Output Feedback.”. Rev. Téc. Fac. Ing. Univ. Zulia, Vol. 34, no. 3, 1, http://www.produccioncientifica.luz.edu.ve/index.php/tecnica/article/view/7192.