1. T. Kawashima, Study on Intelligent Baby Carriage (Development of the pendulum type cage and the assist system), CD-ROM Proc. of Third Asian Conference on Multibody Dynamics, JSME, Tokyo, JAPAN (2006) No. A00646.
2. T. Kawashima, Study on the Internet transmission of the comfortable fluctuation (Development of the Internet transmission system for the heartbeat rhythm), Proceedings of 2005 Symposium on Environmental Engineering, JSME, Muroran, JAPAN (2005) 65–68 (in Japanese).
3. T. Kawashima, Study on the Internet transmission of the comfortable fluctuation (2nd Report: Development of portable heartbeat rhythm reproduction equipment), Proceedings of 2006 Symposium on Environmental Engineering, JSME, Tokyo, JAPAN (2006) 23–26 (in Japanese).
4. T. Kawashima, Development of Active Rocking Chair with Changing Swing According to Heartbeat Fluctuation, JSME International Journal, Ser.C, 49(3) (2006) 814–820.