@article{alinearlyconvergentstochasticlbfgs,
  title = {A Linearly-Convergent Stochastic L-BFGS Algorithm},
  author = {Philipp Moritz and Robert Nishihara and Michael. I. Jordan},
  year = {2015},
  eprint = {1508.02087},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1508.02087v2},
}