Sazonov, S. Yu. High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;
Revnivtsev, M. G. High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;
Sazonov, S. Y., & Revnivtsev, M. G. (2004). Statistical properties of local active galactic nuclei inferred from the RXTE 3-20 keV all-sky survey. Astronomy & Astrophysics, 423(2), 469-480. doi:10.1051/0004-6361:20047150.