@article{1969,
      author       = "Städlich, M. and Deumlich, F. and XIV. Val.shromáždění
                      MUGG, Lucerne, 25.9. - 7.10. 1967",
      title        = "The Approximation of Astronomical Differences in Longitude
                      by Applying the Analysis of Variance  ",
      year         = "1967",
      note         = "2 x 1 seš. - více autorů - viz Dumlich, F.",
}