@InProceedings{SCI:Cho2009a,
  author =    "A.N.M. Imroz Choudhury and S.G. Parker",
  title =     "Ray Tracing NPR-Style Feature Lines",
  booktitle = "Proceedings of the 7th International Symposium on
              Non-Photorealistic Animation and Rendering ({NPAR})
              2009",
  pages =     "5--14",
  year =      "2009",
  keywords =  "ray-tracing",
  url =       "http://www.sci.utah.edu/publications/choudhury09/NPR-lines.NPAR09.pdf",
}