1. A. De Luca, A. Albu-Schaffer, S. Haddadin, G. Hirzinger, Collision detection and safe reaction with the DLR-III lightweight manipulator arm, in: Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and System, 2006, pp. 1623–1630.
2. K.F. Laurin-Kovitz, J.E. Colgate, Design of components for programmable passive impedance, in: Proceedings of the IEEE International Conference on Robotics and Automation, 1991, pp. 1476–1481.
3. T. Morita, S. Sugano, Development of one-D.O.F. robot arm equipped with mechanical impedance adjuster, in: Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and System, 1995, pp. 407–412.
4. M. Okada, Y. Nakamura, S. Ban, Design of programmable passive compliance shoulder mechanism, in: Proceedings of the IEEE International Conference on Robotics and Automation, 2001, pp. 348–353.
5. S. Kang, M. Kim, Safe arm design for service robot, in: Proceedings of the International Conference on Control, Automation and System, 2002, pp. 88–95.