@incollection{TUW-169385, author = {Pfeifer, Norbert and Mandlburger, Gottfried}, title = {Filtering and DTM Generation}, booktitle = {Topographic Laser Ranging and Scanning: Principles and Processing}, year = {2008}, editor = {Shan, Jie and Toth, Charles K.}, pages = {307--333}, publisher = {CRC Press}, isbn = {9781420051421}, note = {invited} }