1. Bokii G.B., Bezrukov G.N., Klyuev Yu.A., et al., [Natural and synthetic diamonds / Ed. Shafranovsky I.I.], Science, Moscow, 222 p. (1986) (in Russian).
2. Zaitsev A.M., [Optical properties of diamond: A data handbook], Springer-Verlag, Berlin, 502 p. (2001).
3. Intrinsic and extrinsic cathodoluminescence from single-crystal diamonds grown by chemical vapour deposition;Collins,1989
4. Intrinsic and extrinsic recombination radiation from undoped and boron‐doped diamonds formed by plasma chemical vapor deposition
5. Intrinsic edge absorption in diamond;Clark,1964