1. Alexander A.E. (1973) Ethics or not, lasers are removing diamond spots. National Jeweler, Vol. 68, No. 8, pp. 1, 31, 46.
2. Anthony T.R., Banholzer W.F., Spiro C.L., Webb S.W., Williams B.E. (1995a) Toughened Chemically Vapor Deposited Diamond. European patent application, open-laid No. 0 671 482 A1, published September 13, 1995.
3. Anthony T.R., Fleischer J.F., Williams B.E. (1995b) Method for Enhancing the Toughness of CVD Diamond. U.S. patent 5,451,430, issued September 19, 1995.
4. Anthony T.R., Banholzer W.F., Spiro C.L., Webb S.W., Williams B.E. (1997) Method of Enhancing the Toughness of CVD Diamond. U.S. patent 5,672,395, issued September 30, 1997.
5. Ashbaugh C.E. (1988) Gemstone irradiation and radioactivity. Gems & Gemology, Vol. 24, No. 4, pp. 196–213.