@book{33265,
	author = {Xu, Yangsheng, and Ou, Yongsheng},
	title = {Control of single wheel robots /},
	publisher = {Springer,},
	year = {c2005},
	address = {Berlin :},
	url = {http://www.loc.gov/catdir/enhancements/fy0663/2005930322-d.html}
}