Takaoka, Y. , Ohta, M. , Sugano, A. , Oda, T. , Maeda, E. , Hanaoka, S. , Masako Matsuura, M.. "e-Learning Program with Voice Assistance for a Tactile Braille". World Academy of Science, Engineering and Technology, Open Science Index 58, International Journal of Educational and Pedagogical Sciences, (2011), 5(10), 1273 - 1276.