@article{efficientlyusingsecondorderinformationin,
  title = {Efficiently Using Second Order Information in Large l1 Regularization Problems},
  author = {Xiaocheng Tang and Katya Scheinberg},
  year = {2013},
  eprint = {1303.6935},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1303.6935v1},
}