R. Aviv, Z. Erlich, and G. Ravid. The 3rd IEEE International Conference on Advanced Learning Technologies, 2003. Proceedings, page 145 -- 149. (July 2003)
A. Geven, R. Sefelin, and M. Tscheligi. Proceedings of the 8th conference on Human-computer interaction with mobile devices and services, page 157--164. Helsinki, Finland, ACM, (2006)
H. Zuurmond, J. Hessling, K. Bluml, M. Lohse, and A. Ijzerman. Mol Pharmacol, 56 (5):
909-16(November 1999)Zuurmond, H M Hessling, J Bluml, K Lohse, M Ijzerman, A P Research
Support, Non-U.S. Gov't United states Molecular pharmacology Mol
Pharmacol. 1999 Nov;56(5):909-16..