1. B.R. and N.J. Lazarenko, 1944, “Electrical Erosion of Metals” in Russian: Gosenergoisdat Leningrad, 27 pages; 7 figures.
2. B.N. Solotych, 1952, "Physical Fundamentals of electrical Spark Machining of Metals" Original in Russian
3. German Edition 1955 by VEB Verlag Technik, Berlin, 90 pages, 50 figures.
4. A.L. Livshiz, 1957, “Electroerosive machining Metals” in Russian, German Edition 1959 by VEB Verlag Technik, Berlin, 145 pages, 62 figures; 7 charts.
5. K. Kohlschutter, 1919, in German: Studying Electrolytic Discharges to understand Electrical Colloid-Zeitschrift für Elektrochemie 1.10.1919 Vol.25 Nr. pp. 309-344.