@article{practicalinexactproximalquasinewton,
  title = {Practical Inexact Proximal Quasi-Newton Method with Global Complexity Analysis},
  author = {Katya Scheinberg and Xiaocheng Tang},
  year = {2013},
  eprint = {1311.6547},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1311.6547v4},
}