1. Anderson, R. and Spong, M.W., Bilateral control of teleoperators with time delay, IEEE Transactions on Automatic Control, Vol. 34, No. 5 (1989), pp. 494-501.
2. Fujita, S. and Sudo, D., Oogata resukyu roboto no kaihatsu : T-52 enryu, Kensetsu no Sekokikaku, Vol. 681 (2006), pp. 40-44 (in Japanese).
3. Imanishi, K., Nakao, M., Kuroda, T. and Koyama, H., Haptic navigation method for improving safety of master-slave type robotic surgery, Transactions of the Virtual Reality Society of Japan, Vol. 8, No. 3 (2003), pp. 321-328 (in Japanese).
4. Ishii, A., Operating system of a double-front work machine for simultaneous operation, Proceedings of International Symposium Automation and Robotics in Construction (2006), pp. 539-542.
5. Iwata, H., Kamezaki, M. and Sugano, S., Sowan kenki notameno soshashienshisutemu no kaihatsu, Kensetsu no Sekokikaku (2008), pp.14-18 (in Japanese).