Measuring deformation related to active sinkholes with ground-based 3D laser scanner. A case study in the evaporite karst of the Ebro Valley, NE Spain - Benito-Calvo, Alfonso; Gutiérrez, Francisco Javier; Carbonel, Domingo; Desir, Gloria; Guerrero, Jesús; Magri, Odette; Karampaglidis, Theodoros; Fabregat González, Iván (2016)