@article{13912,
      author       = "Tscherning, C. C. and I. Inter. Symp. Mathem. and Physic.
                      Foundat. Geodesy - Stuttgart 1993",
      title        = "Isotropic reproducing kernels for the inner of a sphere or
                      spherical shell and their use as density covariance
                      functions  ",
      year         = "1993",
      note         = "2 obr. - Liter. 1 sv.",
}