Voges, Wolfgang High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Szkody, P., Henden, A., Agüeros, M., Anderson, S. F., Bochanski, J. J., Knapp, G. R., et al. (2006). Cataclysmic variables from sloan digital sky survey - V. The fifth year (2004). Astronomical Journal, 131(2), 973-983. doi:10.1086/499308.