1. L. A. Chetkina, V. E. Zavodnik, V. K. Bel'skii, et al., Zh. Strukt. Khim.,27, No. 5, 114 (1986).
2. Ya. A. Gurvich, L. K. Zolotarevskaya, and S. T. Kumok, Phenol Stabilizers [in Russian], TsNIITÉneftekhim, Moscow (1978).
3. V. V. Ershov, G. A. Nikiforov, and A. A. Volod'kin, Sterically Hindered Phenols [in Russian], Khimiya, Moscow (1972).
4. L. A. Chetkina, V. E. Zavodnik, V. K. Bel'skii, et al., Zh. Strukt. Khim.,25, No. 6, 114 (1984).
5. L. A. Chetkina, V. E. Zavodnik, and V. K. Bel'skii, Abstracts of the 4th All-Union Conference on Organic Crystal Chemistry [in Russian], Zvenigorod (1984), p. 195.