Hankel-Norm Approximation Method applied for High Order Model Reduction to Robust Controller Syntesis - Copot, Cosmin; Ionescu, Clara; Keyser, Robain; Dugan, Viorel (The Annals of “Dunarea de Jos“ University of Galati. Fascicle III, Electrotechnics, Electronics, Automatic Control, Informatics, 2012)