@unpublished{TUW-281787, author = {Mandlburger, Gottfried}, title = {State-of-the-art and Current Trends in Airborne Lidar - From Mere Scanning to Hybrid Multipurpose 3D Data Acquisition}, year = {2019}, note = {invited; talk: Intergeo 2019, Stuttgart, Germany; 2019-09-17 -- 2019-09-19} }