Komossa, S. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Komossa, S., & Merrit, D. (2008). Gravitational wave recoil oscillations of black holes: implications for unified models of active galactic nuclei. The Astrophysical Journal, 689(2), L89-L92. doi:10.1086/595883.