@article{Burlet:3953,
      author        = "Burlet, Christian and Van Noten, Koen and Delaby, Serge
                       and Lecocq, Thomas and Verheyden, Sophie and Genty,
                       Dominique and Jaubert, Jacques",
      title         = "{Passive geophysics inside underground cavities: examples
                       of HVSR surveys in the caves of Han-sur-Lesse, Belgium and
                       Bruniquel, France}",
      month         = "Apr",
      year          = "2018",
}