@article{4705,
      author       = "Ledersteger, V. and Symposium on the Figure of the Earth
                      and Refraction, 14 - 17 March 1967, Vienna",
      title        = "Critical Notes on the Mass - Functions Derived from Orbital
                      Perturbations of Artificial Satellites  ",
      year         = "1965",
      note         = "1 seš.",
}