1. M. D. Mashkovskii,Medicinal Preparations [in Russian], Meditsina, Moscow (1984), p. 331.
2. V. F. Borodkin,Dye Chemistry [in Russian], Khimiya, Moscow (1981).
3. A. L. Markman and Yu. P. Zalesov,Maslob.-Zhir. Prom-st,3, 8 (1960).
4. A. L. Markman and V. P. Rzhekhin,Pishch. Prom-st., 66 (1965).
5. I. P. Nazarova, A. I. Glushenkova, and A. L. Markman,Khim. Prir. Soedin., 607 (1976).