@InProceedings{choudhury:2009:RT-NPR,
  author = {Choudhury, A.N.M. Imroz and Parker, Steven G.},
  title = {Ray tracing NPR-style feature lines},
  booktitle = {NPAR '09: Proceedings of the 7th International Symposium on Non-Photorealistic Animation and Rendering},
  year = {2009},
  isbn = {978-1-60558-604-5},
  pages = {5--14},
  location = {New Orleans, Louisiana},
  doi = {http://doi.acm.org/10.1145/1572614.1572616},
  publisher = {ACM},
  address = {New York, NY, USA},
}