@ARTICLE{6818373,
  author={Yang, Shuo and Shi, Zhenwei},
  journal={IEEE Geoscience and Remote Sensing Letters}, 
  title={SparseCEM and SparseACE for Hyperspectral Image Target Detection}, 
  year={2014},
  volume={11},
  number={12},
  pages={2135-2139},
  doi={10.1109/LGRS.2014.2321556}}