@article{16860,
      author       = "Kaufman, B. and International Astronautical Federation.
                      XXVIII Congress. September 25 - October 1, 1977. Praha,
                      Czechoslovakia. IAF - 77 - 209",
      title        = "Luni-Solar Perturbations in the Extended Phase Space
                      Representation of the Vinti Problem  ",
      year         = "1977",
      note         = "1 brož.",
}