1. Development of semi-active suspension (Low cost type);Arai,1999
2. Outline of series 201 diesel vehicle ofJR Hokkaido;Goto,1997
3. A hydraulic active suspension system for railroad passenger cars;Higaki,1993
4. Development of the semi-active vibration control system for the 300 Series Shinkansen (A report on the fIrst test run);Inui,1995
5. Fundamental study on semi-actively controlled pneumatic servo suspensions for rail cars;Jindai,1981