Bender, Ralf Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;
Bender, R., & Kormendy, J. (2003). Supermassive black holes in galaxy centers. In P. Shaver, L. DiLella, & A. Giménez (Eds.), Astronomy, Cosmology and Fundamental Physics: Proceedings of the ESO/CERN/ESA Symposium (pp. 262-266). Berlin: Springer.