1. 1) Namura, A., Matsuo, K. and Miura, S., "Introduction of Buffers into a Transitional Track Stiffness Region," RTRI report, Vol.11, No.2, pp.39-42, 1997 (in Japanese).
2. 2) Ono, S., Ishida, M. and Uchida, M., "Prediction of the Growth of Track Irregularity Using Track Dynamic Model," RTRI report, Vol.15, No.4, pp.39-44, 2001 (in Japanese).
3. 3) Ishida, M., Namura, A., Takikawa, M. and Ono, S., "Measurements of Track Settlement and its Prediction with Track Dynamic Model," RTRI report, Vol.16, No.4, pp.41-46, 2002 (in Japanese).
4. 4) Darr, E. and Fiebig, W., Feste Fahrbahn, Tetzlaff Verlag, Hamburg, Germany, pp.124-126, 1999.