@article{borcsTGRS15,
  author={B\"{o}rcs, A. and Benedek, C.},
  TITLE = {Extraction of Vehicle Groups in Airborne Lidar Point Clouds with Two-Level Point Processes},
  JOURNAL = {IEEE Trans. on Geoscience and Remote Sensing},
  year={2015},
  month={March},
  volume={53},
  number={3},
  pages={1475-1489},
  doi={10.1109/TGRS.2014.2344438},  
}