@article{proximalnewtontypemethodsforminimizing,
  title = {Proximal Newton-type methods for minimizing composite functions},
  author = {Jason D. Lee and Yuekai Sun and Michael A. Saunders},
  year = {2012},
  eprint = {1206.1623},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1206.1623v13},
}