1. (1) Yamamoto, A., Micro-Pressure Wave from Tunnel Exit, Preprint of the Physical Society of Japan, (in Japanese), (1977).
2. (2) Ozawa, S., Studies of Micro-Pressure Wave Radiated from a Tunnel Exit, Railway Technical Research Report, (in Japanese), No.1121 (1979).
3. (5) Maeda, T., Aerodynamic Characteristics of Train and Countermeasures for Decreasing Micro-Pressure Wave, RTRI Report, (in Japanese), Special No.20 (1998).