@ARTICLE{6568877,
  author={Shi, Zhenwei and Tang, Wei and Duren, Zhana and Jiang, Zhiguo},
  journal={IEEE Transactions on Geoscience and Remote Sensing}, 
  title={Subspace Matching Pursuit for Sparse Unmixing of Hyperspectral Data}, 
  year={2014},
  volume={52},
  number={6},
  pages={3256-3274},
  doi={10.1109/TGRS.2013.2272076}}