@techreport{Bartz:2005:TIG,
	author={Dirk Bartz, James T. Klosowski, Dirk Staneker},
	institution={Universit{\"a}t T{\"u}bingen},
	number={WSI-2005-13},
	title={Tighter Bounding Volumes for Better Occlusion Culling Performance},
	type={Technical Report},
	year=2005,
}