Laplacian Lines for Real-Time Shape Illustration
Long Zhang, Ying He, Xuexiang Xie, Wei Chen.
Proceedings of the 2009 symposium on Interactive 3D graphics and games (I3D'09), pp. 129--136, ACM, 
2009.  [BibTeX]
 Real-Time Shape Illustration Using Laplacian Lines
Long Zhang, Ying He, Jiazhi Xia, Xuexiang Xie, Wei Chen.
IEEE Transactions on Visualization and Computer Graphics, Vol. 17, No. 7, pp. 993--1006, july, 
2011.  [BibTeX]