1. Thorne M, Burke D, van de Panne M. Motion doodle: an interface for sketching character motion. Proceedings of SIGGRAPH'04, 2004; 424-431.
2. Davis J, Agrawala M, Chuang E, Popovic Z, Salesin D. A sketching interface for articulated figure animation. In Proceedings of the 2003 ACM SIGGRAPH/Eurographics Symposium on Computer Animation, 2003; 320-328.
3. Sumi F, Nakajima M. A production method of reusing existing 2D animation sequences. In Proceedings of Computer Graphics International , 2003; 282-287.
4. Kallio K. 3D6B editor: projective 3d sketching with line-based rendering. In Proceedings of Eurographics Workshop on Sketch-based Interfaces and Modeling, 2005; 73-80.