GPR imaging of a fracture zone in the Vaucluse Karst Aquifer using 2D eikonal inversionD. Van Vorst, M. Yedlin, Y. Guglielmi, F. Cappa, S. Gaffet, M. Maxwell and D. Oldenburgi-DUST 2010, (2011) 01002DOI: https://doi.org/10.1051/idust/201101002