@Article{isprs-archives-XLII-3-607-2018,
AUTHOR = {Hui, Z. and Cheng, P. and Ziggah, Y. Y. and Nie, Y.},
TITLE = {A THRESHOLD-FREE FILTERING ALGORITHM FOR AIRBORNE LIDAR POINT CLOUDS BASED ON EXPECTATION-MAXIMIZATION},
JOURNAL = {The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences},
VOLUME = {XLII-3},
YEAR = {2018},
PAGES = {607--610},
URL = {https://isprs-archives.copernicus.org/articles/XLII-3/607/2018/},
DOI = {10.5194/isprs-archives-XLII-3-607-2018}
}