1. Aharonowitz, Y., and Demain, A.L. (1978).Antimicrob. Agents Chemother. 14, 159?164.
2. Demain, A.L., Kupka, J., Shen, Y-Q., and Wolfe, S. (1962). Microbiological synthesis of ?-lactam antibiotics. In:Trends in Antibiotic Research, H. Umezawa, A.L. Demain, T. Hata, and C.R. Hutchinson, eds., pp. 233?247, Tokyo: Japan Antibiotic Research Association.
3. Hu, W-S., Braña, A.F., and Demain, A.L. (1983).Enzyme Microbial Technol., in press.