The Suitability of UAS for Mass Movement Monitoring Caused by Torrential Rainfall - A Study on the Talus Cones in the Alpine Terrain in High Tatras, Slovakia. - Rudolf Urban; Martin Stroner; Peter Blistan; Ludovít Kovanic; Matej Patera; Stanislav Jacko; Igor Duriska; Miroslav Kelemen; Stanislav Szabo (ISPRS Int. J. Geo Inf., 2019)