Quality Assessment and Glaciological Applications of Digital Elevation Models Derived from Space-Borne and Aerial Images over Two Tidewater Glaciers of Southern Spitsbergen. - Malgorzata Blaszczyk; Dariusz Ignatiuk; Mariusz Grabiec; Leszek Kolondra; Michal Laska; Leo Decaux; Jacek Jania; Etienne Berthier; Bartlomiej Luks; Barbara Barzycka; Mateusz Czapla (Remote. Sens., 2019)