1. P. Bleys, J.-P. Kruth, B. Lauwers, Proc. of 13th Int. Symp. for Electro-Machining, Bilbao, 2001, 555.
2. Real-time Tool Wear Compensation in Milling EDM
3. B. Buckinx, B. Van Coppenolle, Master's thesis 1993, K.U.Leuven, Dept. of Mech. Eng. Leuven, (in Dutch).
4. J. Crookall, B. Khor, Proc. of the 15th Int. M.T.D.R. Conf. 1974.