1. Social Welfare and War Victims’ Relief Bureau, Ministry of Health, Labour and Welfare.:Heisei 18 nen shintai shogaiji sha jittai chosa kekka. (field study about physical obstacle child, person in 2006.)
2. Sueda, O.: Shindo kankaku to shikaku daikou kiki, souon seigyo. (Vibrotactile Sensation and Vision Substitution). vol. 14, No. 3, pp. 138–141 (1990)
3. Hasegawa, K., Sakurai, T., Makino, Y., Shinoda, H.: Character reading via stylus reproducing normal handwriting motion. IEEE Trans. Haptics 9(1), 13–19 (2016)
4. Tanaka, K., Hasegawa, K., Makino, Y., Shinoda, H.: A pocket-size alphabet display with letter trajectories presented to fingers. Proc. EuroHaptics 2016, 472–482 (2016)