1. Anoto Group AB: Digital pen & paper,
http://www.anoto.com/the-pen.aspx
(accessed, 2009/2/1)
2. Bernstein, N.: The Co-ordination and Regulation of Movements. Pergamon Press, New York (1967)
3. Ferraris, C., Martel, C.: Regulation in Groupware: The Example of a Collaborative Drawing Tool for Young Children. In: Proc. of the 6th Int. Workshop on Groupware, pp. 119–127 (2000)
4. Furukawa, K.: Skill Science. Journal of Japanese Society for Artificial Intelligence 19(3), 355–364 (2004) (in Japanese)
5. Latash, M.L.: Progress in Motor Control. In: Bernstein’s Traditions in Movement Studies, vol. 1. Human Kinetics, Urbana (1998)