1. Pusch, R., Samavati, F., Nasri, A., Wyvill, B.: Improving the sketch-based interface. Vis. Comput. 23(9), 955–962 (2007)
2. Fleisch, T., Rechel, F., Santos, P., Stork, A.: Constraint stroke-based oversketching for 3d curves. In: Proceedings of Eurographics Workshop on Sketch-Based Interfaces and Modeling, pp. 161–165. Fraunhofer Publica, Stuttgart (2004). Eurographics Association
3. Olsen, L., Samavati, F.F., Sousa, M.C., Jorge, J.A.: Sketch-based modeling: a survey. Comput. Graph. 33(1), 85–103 (2009)
4. Chansri, N., Koomsap, P.: Automatic single-line drawing creation from a paper-based overtraced freehand sketch. Int. J. Adv. Manuf. Technol. (2011). doi: 10.1007/s00170-011-3487-z
5. Qin, S.F., Wright, D.K., Jordanov, I.N.: A conceptual design tool: a sketch and fuzzy logic based system. J. Eng. Manuf. 215(1), 111–116 (2001)