Sunyaev, R. A. High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;
Revnivtsev, M. G. High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;
Bikmaev, I. F., Sunyaev, R. A., Revnivtsev, M. G., & Burenin, R. A. (2006). New nearby active galactic nuclei among INTEGRAL and RXTE X-ray sources. Astronomy Letters - A Journal of Astronomy and Space Astrophysics, 32(4), 221-227. doi:10.1134/S1063773706040013.