@article{onlinealternatingdirectionmethodlonger,
  title = {Online Alternating Direction Method (longer version)},
  author = {Huahua Wang and Arindam Banerjee},
  year = {2013},
  eprint = {1306.3721},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1306.3721v2},
}