@conference {107, title = {Global Exponential Stabilization on the $n$-Dimensional Sphere}, booktitle = {Proceedings of the American Control Conference}, series = {NULL}, year = {2015}, month = {June}, pages = {3218--3223}, keywords = {attitude control, hybrid systems}, author = {P. Casau and C. G. Mayhew and R. G. Sanfelice and C. Silvestre} }