@article{VanCamp:4286,
      author        = "Van Camp, M. and Dassargues, A. and Delforge, D. and
                       Delobbe, L. and de Viron, O. and Francis, O.  and Kaufmann,
                       O. and Lecocq, O.  and Van Clooster, M. and Watlet, A.",
      title         = "{Hydrogeological effects on terrestrial gravity
                       measurements}",
      month         = "Dec",
      year          = "2019",
      note          = "Measuring gravity at Membach and Rochefort for more than
                       twenty years!",
}