1. USSR Inv. Certif. No. 339134, 10.07.1956;Spitsyn;Official Bulletin of Inventions of USSR,1980
2. W.G. Eversole, US Patent No. 3030188, 23.07.1958.
3. J.A. Brinkman, C.J. Meechan and H.M. Dieckamp, US Patent No. 3175885, 01.06.1960.
4. Low energy electron diffraction study of the (111) diamond surface
5. Selected Values of the Thermodynamic Properties of the Elements;Hultgren,1973