@article {50,
	title = {Quaternion-Based Hybrid Controller for Robust Global Attitude Tracking},
	journal = {IEEE Transactions on Automatic Control},
	volume = {56},
	number = {11},
	year = {2011},
	month = {November},
	pages = {2555{\textendash}2566},
	keywords = {attitude control},
	doi = {http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5701762},
	url = {https://hybrid.soe.ucsc.edu/files/preprints/50.pdf},
	author = {C. G. Mayhew and R. G. Sanfelice and A. R. Teel}
}
