@article{dcapproximationapproachesforsparse,
  title = {DC approximation approaches for sparse optimization},
  author = {Hoai An Le Thi and Tao Pham Dinh and Hoai Minh Le and Xuan Thanh Vo},
  year = {2014},
  eprint = {1407.0286},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1407.0286v2},
}