4Kilian J, Haala N, Englich M. Capture and Evaluation of Airborne I.aser Scanner Data[J]. IAPRS, 1996,31(B3) :193-203.
5Pfeifer N, Kostli A, Kraus K. Interpolation and Filtering of I.aser Scanner Data Implementation and First Results[J]. IAPRS, 1998,32(3/1): 153-159.
6Vosselman G. Slope Based Filtering of Laser Altimetry Data[J]. IAPRS, 2001,33(B3):935-942.
7Axelsson P. DEM Generation from Laser Scanner Data Using Adaptive TIN Models [J]. IAPRS, 2001,33(B4): 110-117.
8Sithole G, Vosselman G. Filtering of Airborne I.aser Scanner Data Based on Segmented Point Clouds [J]. IAPRS, 2005,33,(3/W19): 66-71.
9Sithole G, Vosselman G. Experimental Comparison of Filter Algorithms for Bare-Earth Extraction from Airborne Laser Scanning Point Clouds[J]. ISPRS Journal of Photogrammetry & Remote Sensing, 2004, 59:85-101.
10Roggero M. Airborne Laser Scanner: Clustering in Raw Data[J]. IAPRS, 2001,34(3W/4): 227-232.