An On-line Sketch Recognition Algorithm for Composite Shape. - Zhan Ding; Yin Zhang 006; Wei Peng; Xiuzi Ye; Huaqiang Hu (FSKD (2), 2005)

PENCIL: A Framework for Expressing Free-Hand Sketching in 3D. - Zhan Ding; Sanyuan Zhang; Wei Peng; Xiuzi Ye; Huaqiang Hu (ICNC (1), 2005)