Kauffmann, G. Cosmology, MPI for Astrophysics, Max Planck Society;
Best, P. N., Kaiser, C. R., Heckman, T. M., & Kauffmann, G. (2006). AGN-controlled cooling in elliptical galaxies. Monthly Notices of the Royal Astronomical Society: Letters, 368(1), L67-L71. doi:10.1111/j.1745-3933.2006.00159.x.