1. Akima H., A New Method of Interpolation and Smooth Curve Fitting Based on Local Procedures, Journal A.C.M., Vol.17, No.4 (1970), pp.589-602.
2. Litvin, F., Theory of Gearing (1989), NASA Reference Publication 1212 (AVSCOM Technical Report 88-C-035), p.132.
3. Litvin, F., and Fuentes, A., Gear Geometry and Applied Theory Second Edition (2004), p.94, CAMBRIDGE UNIVERSITY PRESS.
4. Naruse, M., Fujii, Y., Sakai, T., Matsuyama, T., Tobe, T., Takanashi, S., Inoue, K. and Tsuchikawa, T., Study of Gears (1960), p.19 (in Japanese), Yokendo Ltd. Publishers.
5. Sasaki, H., Matsuba, A., Mondou, M., Takeyasu, Y., Miyaoku, T. and Kanehiro J., Development of Non-Involute Gear with New Tooth Profile Based on Cornu Spiral for Bending Strength of Spur Gear, Bulletin of Hiroshima Prefectural Technology Research Institute, Eastern Region Industrial Research Center, No.22 (2009), pp.1-5(in Japanese).