1. T. V. Akalaeva, A. I. Bokanov, P. Yu. Ivanov, et al., Khim.-farm. Zh., No. 3, 299–302 (1989).
2. O. V. Baklanova, E. N. Padeiskaya, and S. N. Kutchak, Antibiotiki, No. 1, 48–52 (1987).
3. A. A. Fedorov (ed.), Plant Life [in Russian], Vol. 1, pp. 289–290; Vol. 2, p. 99, Moscow (1974).
4. L. I. Kursanov and N. A. Kamarnitskii, Course on Lower Plants [in Russian], Moscow (1945), pp. 235–239.
5. G. N. Pershin (ed.), Methods of Experimental Chemotherapy [in Russian], Moscow (1971), pp. 100–187.