Fujita. S., Morikawa, Y., Shimoda, I., Nagata, S. and Shimosaka, H., Isolation system for equipment using friction pendulum bearings : 1st report, shaking table tests and response analysis on isolated equipment, Transactions of the Japan Society of Mechanical Engineers, Series C, Vol. 59, No. 557 (1993), pp. 11-16 (in Japanese).
Fujita, T., Kuramoto, S. and Omi, T., A three-dimensional earthquake isolation device, Transactions of the Japan Society of Mechanical Engineers, Series C, Vol. 51, No. 471 (1985), pp. 2768-2778 (in Japanese).
Fujita, T., Nakajima, K., Sugimoto, H., Seko, Y. and Omi, T., A 3-dimensional seismic isolation floor using a conversion mechanism of vibration direction for vertical isolation, Transactions of the Japan Society of Mechanical Engineers, Series C, Vol. 56, No. 526 (1990), pp. 1377-1380 (in Japanese).
Fujita, T., Yogo, K., Omi, T. and Koizumi, T., An earthquake isolation device using linear motion mechanism, Transactions of the Japan Society of Mechanical Engineers, Series C, Vol. 50, No. 456 (1984), pp. 1339-1350 (in Japanese).
Fukasawa, T., Fujita, S., Kurabayashi, H and Kinoshita, A., Study of earthquake isolation system using vertically utilized coiled springs : 1st report, 2nd report, Transactions of the Japan Society of Mechanical Engineers, Series C, Vol. 74, No. 739 (2008), pp. 506-520 (in Japanese).