4D Monitoring of Active Sinkholes with a Terrestrial Laser Scanner (TLS): A Case Study in the Evaporite Karst of the Ebro Valley, NE Spain. - Alfonso Benito-Calvo; Francisco Gutiérrez; Adrián Martínez-Fernández; Domingo Carbonel; Theodoros Karampaglidis; Gloria Desir; Jorge Sevil; Jesús Guerrero; Ivan Fabregat; Ángel García-Arnay (Remote. Sens., 2018)