Generalized eccentric vs. true anomaly parametrizations in the perturbed   Keplerian motion
  The angular and the radial parts of the dynamics of the perturbed Kepler motion are separable in many important cases. In this paper we study the radial motion and its parametrizations. We develop in detail a generalized eccentric anomaly parametrization and a procedure of computing a generic class of integrals based on the residue theorem. We apply the formalism to determine various contributions to the luminosity of a compact binary. 
Bal\'azs Mik\'oczi, Zolt\'an Keresztes