@inproceedings{Nirenstein:2002:EFV,
author = {S. Nirenstein and E. Blake and J. Gain},
title = {Exact from-region visibility culling},
booktitle = {Proceedings of the 13th workshop on Rendering},
year = {2002},
isbn = {1-58113-534-3},
pages = {191--202},
location = {Pisa, Italy},
publisher = {Eurographics Association},
}