@conference {71, title = {Global Trajectory Tracking for a Class of Underactuated Vehicles}, booktitle = {Proceedings of the American Control Conference}, series = {NULL}, year = {2013}, month = {June}, pages = {419{\textendash}424}, keywords = {attitude control}, url = {https://hybrid.soe.ucsc.edu/files/preprints/71.pdf}, author = {P. Casau and R. G. Sanfelice and R. Cunha and D. Cabecinhas and C. Silvestre} }