1. T. N. Povet’eva, V. G. Pashinskii, V. V. Dudko, et al., Rast. Res., No. 2, 80 (2001).
2. O. Shigeo, Y. Masahiro, W. Tsumotu, Nippon Nogoi Kasuru Kaishi, 44(10), 437 (1970).
3. D. A. Shmatkov and D. M. Popov, Collection of Scientific Papers of the Research Institute of Pharmacy [in Russian], NIIF, Moscow (2000).
4. W. Chalcarz, M. Urbanowicz, and M. Powlak, Herba Polonica, 31(2), 109 (1984).
5. K. Morita, Y. Nishijima, T. Kada, Agric. Biol. Chem., 49(4), 925 (1985).