@article{Prieur:1924,
      author        = "Prieur, J.-L. and  Oblak, E. and  Lampens, P. and 
                       Kurpinska-Winiarska, M. and  Aristidi, E. and  Koechlin, L.
                       and  Ruymaekers, G.",
      title         = "{Speckle observations of binary systems measured by
                       Hipparcos}",
      year          = "2001",
}