Journal Version:

@article{qu2016finding,
  title={Finding a Sparse Vector in a Subspace: Linear Sparsity Using Alternating Directions},
  author={Qu, Qing and Sun, Ju and Wright, John},
  journal={IEEE Transactions on Information Theory}, 
  year={2016},
  volume={62},
  number={10},
  pages={5855-5880},
}

Conference Version:

@inproceedings{qu2014finding, 
   title={Finding a sparse vector in a subspace: Linear sparsity using alternating directions}, 
   author={Qu, Qing and Sun, Ju and Wright, John}, 
   booktitle={Advances in Neural Information Processing Systems}, 
   pages={3401--3409}, 
   year={2014} 
}