1. Organic Fluorine Chemistry;Sheppard,1969
2. Steroid transformation by microorganisms;Mahato;Phytochemistry,1983
3. Microbial process for 9α-hydroxylation of steroids;Marshek;C.A.,1983
4. Production of 9α-hydroxy-4-androstene-3,17-dione;Schering;C.A.,1980
5. Fermentative production of 9α-hydroxy steroids;Mitsubishi Chem Ind Co, Ltd;C.A.,1981