Schaaf, O. Research Group Mass Spectrometry, MPI for Chemical Ecology, Max Planck Society;
Schaaf, O., & Dettner, K. (1998). Transformation of steroids by Bacillus strains isolated from the foregut of water beetles (Coleoptera: Dytiscidae): I. Metabolism of androst-4-en-3,17-dione (AD). Journal of Steroid Biochemistry and Molecular Biology, 67(5-6), 451-465. doi:10.1016/S0960-0760(98)00137-X.