@article{sparsematrixinversionwithscaledlasso,
  title = {Sparse Matrix Inversion with Scaled Lasso},
  author = {Tingni Sun and Cun-Hui Zhang},
  year = {2012},
  eprint = {1202.2723},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1202.2723v2},
}