[1992] Proceedings of the IEEE International Symposium on Industrial Electronics Industrial Electronics, 1992., Proceedings of the IEEE International Symposium on. :177-181 vol.1 1992
1991 IEEE International Symposium on Circuits and Systems (ISCAS) Circuits and Systems (ISCAS), 1991 IEEE International Symposium on. :2411-2414 vol.5 1991
Proceedings IECON '91: 1991 International Conference on Industrial Electronics, Control and Instrumentation Industrial Electronics, Control and Instrumentation, 1991. Proceedings. IECON '91., 1991 International Conference on. :1747-1751 vol.3 1991