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)
S. Mayer, G. Perihan, K. Wolf, P. Woźniak, and N. Henze. Proceedings of the 19th International Conference on Human-Computer Interaction with Mobile Devices and Services, ACM, (2017)