Ritter, Hans Stellar Astrophysics, MPI for Astrophysics, Max Planck Society;
Ritter, H., & King, A. (2002). On the accretion efficiency of neutron stars in long-period binaries. In B. Gänsicke, K. Beuermann, & K. Reinsch (Eds.), The physics of cataclysmic variables and related objects (pp. 531-532). San Francisco: Astronomical Society of the Pacific.