@article{Bernardini:2000:DDO,
	author={Fausto Bernardini and James T. Klosowski and Jihad El-Sana},
	journal={Computer Graphics Forum (Proceedings of Eurographics 2000)},
	month=aug,
	number=3,
	pages={507-516},
	title={Directional Discretized Occluders for Accelerated Occlusion Culling},
	volume=19,
	year=2000,
}