@ARTICLE{AS94,
  AUTHOR = "S.S. Abi-Ezzi and S. Subramaniam",
  TITLE = "Fast Dynamic Tessellation of Trimmed {NURBS} Surfaces",
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  NOTE = "Proc. of Eurographics"}

@ARTICLE{KML96,
  AUTHOR = "S. Kumar and D. Manocha and A. Lastra",
  TITLE = "Interactive Display of Large {NURBS} Models",
  JOURNAL = "IEEE Transactions on Visualization and Computer Graphics",
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@INPROCEEDINGS{ZMHH97,
  AUTHOR = "H. Zhang and D. Manocha and T. Hudson and K. Hoff",
  TITLE = "Visibility Culling using Hierarchical Occlusion Maps",
  BOOKTITLE = SIGGRAPH,
  YEAR = 1997
}