[1] [2] 
Rendering Parametric Surfaces in Pen and Ink
George Winkenbach, David H. Salesin.
SIGGRAPH 96,
1996. [BibTeX]
Reproducing color images as duotones
Joanna L. Power, Brad S. West, Eric J. Stollnitz, David H. Salesin.
Proceedings of the 23rd Annual Conference on Computer Graphics and Interactive Techniques (SIGGRAPH'96), pp. 237--248, ACM Press,
1996. [BibTeX]
Scale-dependent reproduction of pen-and-ink illustrations
Author(s): Michael P. Salisbury, Corin Anderson, Dani Lischinski, David H. Salesin.
Proceedings: Proceedings of the 23rd annual conference on Computer graphics and interactive techniques, pp. 461--468,
1996.
[BibTeX] 
SKETCH: An Interface for Sketching 3D Scenes
Robert C. Zeleznik, Kenneth P. Herndon, John F. Hughes.
Proceedings of SIGGRAPH '96, August,
1996. [BibTeX]
Special Effects with Half-Toning
John W. Buchanan.
Computer Graphics Forum, Vol. 15, No. 3, pp. 97--108,
1996. [BibTeX]
The Painterly Approach
Wasinee Rungsarityotin, Victor Zordan.
Georgia Tech. - (Project: Advanced Topics in Rendering),
1996. [BibTeX]