Phleps, S. Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;
Phleps, S., Wolf, C., Peacock, J. A., Meisenheimer, K., & van Kampen, E. (2007). COMBO-17 measurements of the effect of environment on the type-dependent galaxy luminosity function. Astronomy & Astrophysics, 468(1), 113-120. doi:10.1051/0004-6361:20066859.