1. OMV Ag — “Pumps in Process Engineerin” 2002.
2. http://en.wikipedia.org/wiki/Carbon
3. Fraunhofer Institute, Germany http://www.ist.fraunhofer.de/english/c-products/tab/complete.html
4. Ion-beam deposition of thin films of diamond like carbon;Aisenberg;J. of Applied Physics,1971
5. US Patent 3 840 451: “Method of Producing an Artificial Diamond Film”, 1972.