@article {113,
	title = {Robust Global Trajectory Tracking for a Class of Underactuated Vehicles},
	journal = {Automatica},
	volume = {58},
	year = {2015},
	month = {August},
	pages = {90-98},
	keywords = {attitude control},
	author = {P. Casau and R. G. Sanfelice and R. Cunha and D. Cabecinhas and C. Silvestre}
}