---

A Non-Photorealistic Lighting Model for Automatic Technical Illustration
Amy Gooch, Bruce Gooch, Peter S. Shirley, Elaine Cohen
Proceedings of SIGGRAPH 98

  @inproceedings{Gooch:1998:ANL,
    title = "A Non-Photorealistic Lighting Model for Automatic Technical Illustration",
    author = "Amy Gooch and Bruce Gooch and Peter S. Shirley and Elaine Cohen",
    booktitle = "Proceedings of SIGGRAPH 98",
    series = "Computer Graphics Proceedings, Annual Conference Series", 
    month = jul, 
    year = 1998,
    pages = "447--452",
  }