Sunyaev, R. A. High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;
Revnivtsv, M. G., & Sunyaev, R. A. (2002). Localization of the X-ray burster KS 1731-260 from Chandra data. Astronomy Letters - A Journal of Astronomy and Space Astrophysics, 28(1), 19-20.