Pietsch, W. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Carpano, S., Ehle, M., & Pietsch, W. (Eds.). (2008). Proceedings of the ESAC faculty workshop on X-rays from nearby galaxies. Garching b. München: Max-Planck-Institut für extraterrestrische Physik.