1. Lecture Notes in Computer Science;K Al Faraj,2009
2. Aulagner, G., François, R., Martin, B., Michel, D., Raynal, M.: FloodKey: increasing software keyboard keys by reducing needless ones without occultation. In: Proceedings of the 10th WSEAS International Conference on Applied Computer Science, pp. 412–417. World Scientific and Engineering Academy and Society (WSEAS), ACM, New York (2010)
3. Lecture Notes in Computer Science;G Badr,2009
4. Banubakode, S., Dhawale, C.: Survey of eye-free text entry techniques of touch screen mobile devices designed for visually impaired users. Covenant J. Inform. Commun. Technol. 2(1) (2013)
5. Bellman, T., MacKenzie, I.S.: A probabilistic character layout strategy for mobile text entry. In: Proceedings of Graphics Interface 1998 - GI 1998, pp. 168–176. Canadian Information Processing Society (CIPS), Toronto (1998)