1. Current Trends in Non-Conventional Machining Techniques;Snoeys;Annals of CIRP,1986
2. Anonym, Electro Discharge Machining, Definitions and Terminology, Cooperative work CIRP, FME, VDI, VSM, 1976.
3. Technological surfaces - an Objective Criterion for Comparing EDM-Systems;Cornelissen;Annals of CIRP,1978
4. Survey of Adaptive Control in Electro Discharge Machining;Snoeys;Annals of CIRP,1979
5. Pfau J. U.S. Patent nr. 4.057.703, 1977.