1. V. V. Panina and O. S. Madaeva, Khim. Farm. Zh., No. 5, 37–38 (1967).
2. R. Carle, A. W. Alfermann, and E. Reinhard, Planta Med.,32, 195–196 (1977).
3. D. Vaguifalvi, M. Maroti, and P. Tetenyi, Phytochemistry,10, 1389–1390 (1971).
4. E. I. Korneva, L. F. Matveenko, Z. Khabazi, et al., Rast. Resursy,8, 507–515 (1972).
5. L. A. Pikova, V. V. Panina, E. I. Korneva, et al., Rast. Resursy,13, 531–534 (1977).