@ARTICLE{Mueller:2009:SO,
    author = {T. M{\"u}ller},
    title = {{Analytic observation of a star orbiting a Schwarzschild black hole}},
    journal = {Gen. Rel. Grav.},
    year = {2009},
    volume = {41},
    pages = {541--558},
    doi = {10.1007/s10714-008-0683-8}
}