@Article{grg08b-muelleta,
  author = {Müller, T. },
  title  = {{Analytic observation of a star orbiting a Schwarzschild black hole}},
  year   = {2008},
  pages  = {541-558},
  journal = {{Gen. Rel. Grav.}},
  volume = {{41}},
  doi = {{10.1007/s10714-008-0683-8}}
}