Real-Time Nonphotorealistic Rendering
Lee Markosian, Michael A. Kowalski, Samuel J. Trychin, Lubomir D. Bourdev, Daniel Goldstein, John F. Hughes.
ACM Siggraph 97, Annual Conference Series 1997, pp. 415--420, August,
1997. [BibTeX]
Statistical Techniques for the Automatic Generation of Non-Photorealistic Images
S. M. F. Treavett, Min Chen.
Proc. 15th Eurographics UK Conference, March,
1997. [BibTeX]