1. Russian Federation patent 2197994 (2003)
2. RZh Khimiya, 03.10 - 10O.325P (2003).
3. French patent 9408130 (1996), RZh Khimiya 7O548 P (1999).
4. I. A. Vakulenko, V. A. Startseva, L. E. Nikitina, et al., in: Proceedings of the VI All-Russian Conference “Chemistry and Technology of Plant Substances” [in Russian], Syktyvkar (2006).
5. E. V. Sirazieva, V. A. Startseva, L. E. Nikitina, et al., Proceedings of the International Conference “Organic Chemistry from Butlerov and Beilstein to the Present” [in Russian], St. Petersburg (2006), p. 447.