@article{14:26,author={Sohail Bahmani and Bhiksha Raj and Petros T. Boufounos}, Title={Greedy Sparsity-Constrained Optimization},journal={Journal of Machine Learning Research},volume={14}, url={http://www.jmlr.org/papers/volume14/bahmani13a/bahmani13a.pdf}}
Greedy Sparsity-Constrained Optimization.pdf