E. Tosun, Y. Gingold, J. Reisman, and D. Zorin. Symposium on Geometry Processing, volume 257 of ACM International Conference Proceeding Series, page 193-202. Eurographics Association, (2007)
D. Harmon, Q. Zhou, and D. Zorin. Proceedings of the 2011 ACM SIGGRAPH/Eurographics Symposium on Computer Animation, page 247--256. New York, NY, USA, ACM, (2011)