1. Meth. Biochem. Anal.,22, 307 (1974).
2. L. L. Stremovskii, Khim.-Farm. Zh., No. 10, 55 (1976).
3. J. Melling and D. Westmacott, J. Appl. Chem. Biotechnol.,22, 951 (1972).
4. J. Melling and D. Westmacott, J. Appl. Chem. Biotechnol.,23, 166 (1973).
5. G. A. Yaskovich, I. E. Karnaukhova, and V. Ya. Vorob'eva, Prikl. Biokhim. Mikrobiol.,12, No. 2, 282 (1976).