1. Microbial transformation of steroids;Charney,1967
2. Steroid biochemistry;Heftmann,1970
3. Microbial transformation of steroids;Arima,1969
4. Microbial transformation of sterols;Nagasawa,1969
5. Microbiological production of 20-carboxy-pregna-1, 4-dien-3-one from β-sitosterol with high yield by a Rhodococcus species;Iida;J. Ferment. Technol.,1985