(:notitlegroup:) 

   @article{kapoor_95,
    title     = {Spherical Coordinate Green's Function for Ring Tractions in a Solid Unbounded
                Medium},
    author    = {T. Kapoor and Henrik Schmidt},
    journal   = {Journal Acoustical Society of America},
    pages     = {2783--2791},
    volume    = {98(5)},
    year      = {1995}}