1. Materiais Condutores. Available in: http://www.labspot.ufsc.br/∼jackie/cap3_new.pdf. Accessed on: 10 October 2002.
2. Hochleistungszerspannung von Graphit;König,1995
3. Properties and characteristics of graphite, Chapter 5. Available at: http://www.poco.com/Library/edm/SG GERMAN.pdf. Accessed on: 02 October 2002.
4. High-speed milling of advanced materials;Nieminen;J. Mater. Process. Technol.,1996
5. M. König, Fräsbearbeitung von Graphitelektroden. 134f. PhD Thesis, Rheinisch-Westfälischen Technischen Hochschule Aachen, Aachen, Alemanha, 1997.