1. M. N. Shchukina, Zh. Vses. Khim. Obshchestva im. D. I. Mendeleeva,10, 637 (1965).
2. G. N. Pershin, T. N. Zykova, M. N. Shchukina, N. B. Galstukhova, V. V. Utkin, and N. M. Makarevich, Authors' Certificate No. 308760; Izobreteniya,48, No. 22, 22 (1971).
3. G. N. Pershin and T. N. Zykova, Probl. Tuberk.,50, 60 (1972).
4. V. V. Utkin, N. M. Makarevich, N. P. Krylova, et al., Trudy Tsentral'n. Nauchno-Issled. Instituta Tuberkuleza,18, 119 (1970).
5. V. V. Utkin, Antibiotiki, No. 9, 851 (1972).