1. ALVA Mobile Phone Organizer,
http://www.alvaBraille.com/mpo/
2. Lecture Notes in Computer Science;A.. Arato,2002
3. Arató, A., Barkaszi, M., Budai, L., Vaspöri, T.: Hybrid Books for the Blind - A new form of Talking Books. In: Proc. 5th International Conference, ICCHP 1996, R. Oldenbourg Wien München, vol. 1, pp. 237–248 (1996)
4. JAWS screen reader program,
http://www.freedomscientific.com/fs_products/software_jaws.asp
5. Blenkhorn, P.: A System for Converting Braille into Print. IEEE Trans Rehab. Eng. 3(2), 215–221 (1995)