1. Aerodynamic force acting on a high speed train at tunnel entrance;Hara;Bulletin of the Japan Society of Mechanical Engineers,1961
2. Aerodynamics of high-speed train;Hara;Monthly Bulletin of the International Railway Congress Association,1968
3. S. Ozawa, Y. Morito, T. Maeda, M. Kinosita, Investigation of the pressure wave radiated from a tunnel exit, Railway Technical Research Institute Report No. 1023, 1976 (in Japanese).
4. W.A. Woods, C.W. Pope, Secondary aerodynamic effects in rail tunnels during vehicle entry, Proceedings of the Second BHRA Symposium of the Aerodynamics and Ventilation of Vehicle Tunnels, Cambridge England, 23–25 March 1976, Paper C5, pp. 71–86.
5. Luftwiderstand und Druckverlauf bei der Fahrt von Zügen in einem Tunnel;Tollmien;Zeitschrift des Vereines Deutscher Ingenieure,1927