@article{Camelbeeck:3512,
      author        = "Camelbeeck, Thierry and Quinif, Yves and Verheyden, Sophie
                       and Vanneste, Kris and Knuts, Elisabeth",
      title         = "{Earthquakes as collapse precursors at the Han-sur-Lesse
                       cave in the Belgian Ardennes}",
      year          = "2018",
}