@article{gao2017semi,
  title={Semi-Supervised Sparse Representation Based Classification for Face Recognition with Insufficient Labeled Samples},
  author={Gao, Yuan and Ma, Jiayi and Yuille, Alan L.},
  journal={IEEE Transactions on Image Processing},
  volume={26},
  number={5},
  pages={2545--2560},
  year={2017},
  publisher={IEEE}
}