@article{716,
      author       = "Kelm, Rainer and I. Inter. Symp. Mathem. and Physic.
                      Foundat. Geodesy - Stuttgart 1993",
      title        = "Adaptive Estimation Within the Realization of Geodetic
                      Reference Frames: A Concept Study  ",
      year         = "1993",
      note         = "Abstr. - Liter. 1 sv.",
}