@ARTICLE{Mueller:2010:GV,
    author = {T. M{\"u}ller and F. Grave},
    title = {GeodesicViewer - A tool for exploring geodesics in the theory of relativity},
    journal = {Computer Physics Communications},
    year = {2010},
    volume = {181},
    pages = {413--419},
    doi = {10.1016/j.cpc.2009.10.010}
}