@article{zhang_TSMC_annotation,
  title={Automatic image annotation and retrieval using group sparsity},
  author={Zhang, Shaoting and Huang, Junzhou and Li, Hongsheng and Metaxas, Dimitris N},
  journal={IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics},
  volume={42},
  number={3},
  pages={838--849},
  year={2012},
  publisher={IEEE}
}