1. F. K. Volynets, Opt.-Mekh. Promst., No. 10, 47 (1973).
2. F. K. Volynets, Opt.-Mekh. Eromst., No. 9, 49 (1973).
3. V. V. Rogov, L. L. Burman, et al., in: Synthetic Diamonds No. 4 [ni Russian], Naukova Dumka (1977), p. 64.
4. V. V. Rogov and L. L. Burman, in: Siynthetic Diamonds ? the Key to Technical Progress, Part 2 [in Russian], Naukova Dumka, Kiev (1977), p. 102.