@article{Camelbeeck:1612,
      author        = "Camelbeeck, Thierry and Verbeiren, Roland and Martin,
                       Henri and Flick, J.",
      title         = "{The Roermond earthquake of April 13, 1992. Preliminary
                       investigation using data from the seismic network in
                       Belgium and GD of Luxemburg}",
      year          = "1992",
}