@article{Camelbeeck:1559,
      author        = "Camelbeeck, Thierry and van Eck, Torild and Pelzing, Rolf
                       and Ahorner, Ludwig and Loohuis, J. and Haak, H.W. and
                       Hoang-Trong, Pho and Hollnack, D.",
      title         = "{The 1992 Roermond earthquake, the Netherlands, and its
                       aftershocks}",
      year          = "1994",
}