1. T. Tanimura and C. J. Heuvelman, ?The properties of the servo gap sensor with wire spark-erosion machining?,Annals of the CIRP 26(1), pp. 59?63, 1977.
2. N. Kinoshita, M. Fukui and G. Gamo, ?Control of wire-EDM preventing electrode from breaking?,Annals of the CIPR,31(1), pp. 111?114, 1982.
3. K. P. Rajurkar and W. M. Wang, ?On-line monitor and control for wire breakage in WEDM?,Annals of CIRP 40(1), pp. 219?222, 1991.
4. K. P. Rajurkar and W. M. Wang, ?WEDM identification and adaptive control for variable-height components?,Annals of the CIRP 43(1), pp. 199?202, 1994.
5. M. Sugeno (ed.),Industrial Application of Fuzzy Control North-Holland, Amsterdam, 1985.