@conference {skarpetis2012robust,
	title = {Robust Arbitrary Reference Command Tracking with Application to Hydraulic Actuators.},
	booktitle = {ICINCO (1)},
	year = {2012},
	pages = {94{\textendash}102},
	author = {Skarpetis, Michael G and Fotis N. Koumboulis and Ntellis, Achilleas S}
}
