1. Fernandes, P., Cruz, A., Angelova, B., Pinheiro, H.M., and Cabral, J.MS., Enz. Microb. Technol., 2003, vol. 32, no. 6, pp. 688–705.
2. Bortolini, O., Medici, A., and Poli, S., Steroids, 1997, vol. 62, nos. 8–9, pp. 564–577.
3. Charney, W. and Herzog, H.L., Microbial Transformations of Steroids, New York: Acadimic, 1967.
4. Akhrem, A.A. and Titov, Yu.Ya., Steroidy i mikroorganizmy (Steroids and Microorganisms), Moscow: Nauka, 1970.
5. Mahato, S.B. and Mukherjee, A., Phytochemistry, 1984, vol. 23, no. 10, pp. 2131–2154.