Ritter, Hans Stellar Astrophysics, MPI for Astrophysics, Max Planck Society;
Ritter, H., & Kolb, U. (2012). A catalogue of cataclysmic binaries, low-mass X-ray binaries and related objects - RKcat Edition 7.17. Garching, Germany: Hans Ritter. Retrieved from http://www.mpa-garching.mpg.de/RKcat/.