@article{16386,
      author       = "Kovalevsky, J. and Inter. Summer School of Theor. Geodesy,
                      Assisi, 23.5.-3.6.1988",
      title        = "Lectures in celestial mechanics  ",
      year         = "1988",
      note         = "Obr. v textu. - Liter., 1 sv.",
}