Multitemporal Analysis of Gully Erosion in Olive Groves by Means of Digital Elevation Models Obtained with Aerial Photogrammetric and LiDAR Data. - Tomás Fernández; José Luis Pérez-García; José Miguel Gómez-López; Javier Cardenal; Julio Calero; Mario Sánchez-Gómez; Jorge Delgado; Joaquín Tovar-Pescador (ISPRS Int. J. Geo Inf., 2020)