1. A. M. Kharitonova, Antibiotiki, 2, No. 4, 46 (1957).
2. P. Ambrosioni, S. Masoni, Boll. ist. sieroterap. (Milan, 1955) v. 34, p. 408.
3. P. Ambrosioni and S. Masoni, Boll ist, sierotrap. (Milan, 1955) v. 34, p. 418.
4. C. M. Ambrus, C. N. Sideri, et al., Antibiot and Chemother. 1955, v. 5, p. 521.
5. G. W. Fischer, zentr. Bakt. 1955, v. 164, p. 230.