1. Botden, Th. P.J., “Inleiding over ontladingaver-schijnselen in het vonkerosis proces”, CFT verslag nr. 03/71, Philips centre for technology.
2. Cornelissen H., “Klassifikatie van vonkerosieve impulsen”, Rapport 79R5, Katholieke Universiteit Leuven, Dep. Werktuigkunde, 1979.
3. Crookall J.R., “The significance of pulse efficiency in the effective utilisation of E.D.M. in practive”, IEE Conference on Electrical Methods of Machining, Forming and Coating, Pub. no. 133, nov. 1975, pp.118-224.
4. Dauw D., “On-line Identification and Optimization of Electro-Discharge Machining”, Ph.D thesis, Katholieke Universiteit Leuven, 1985, 85 Dl, U.D.C. 621 9.048.4.
5. “Advanced Pulse Discriminating System for EDM Processes and Control”;Dauw;Annals of the CIRP,1983