1. Begej, S.: An optical tactile array sensor. SPIE Intell. Robot. Comput. Vis. 521, 271–280 (1984)
2. Yamada, K., Goto, K., Nakajima, Y., Koshida, N., Shinoda, H.: A sensor skin using wire-free tactile sensing elements based on optical connection. In: Proceedings of the 41st SICE Annual Conference (SICE 2002), vol. 1, pp. 131–4. The Society of Instrument and Control Engineers (SICE), Tokyo (2002)
3. Lee, M.H., Nicholls, H.R.: Tactile sensing for mechatronics – a state of the art survey. Mechatronics 9(1), 1–31 (1999)
4. Nicholls, H.R., Lee, M.H.: A survey of robot tactile sensing technology. Int. J. Robot. Res. 8(3), 3–30 (1989)
5. Ferrier, N.J., Brockett, R.W.: Reconstructing the shape of a deformable membrane from image data. Int. J. Robot. Res. 19(9), 795–816 (2000)