B. Höferlin, and G. Heidemann. WSCG 2010, 18th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision, (2010)
K. Kurzhals, M. Stoll, A. Bruhn, and D. Weiskopf. Symposium on Computational Aesthetics, Sketch-Based Interfaces and Modeling, and Non-Photorealistic Animation and Rendering (EXPRESSIVE, co-located with SIGGRAPH)., page 1:1-1:9. (2017)