@inproceedings{multistagemultitaskfeaturelearning,
  title = {Multi-Stage Multi-Task Feature Learning},
  author = {Pinghua Gong and Jieping Ye and Chang-Shui Zhang},
  year = {2012},
  booktitle = {NeurIPS 2012 12},
  url = {http://papers.nips.cc/paper/4729-multi-stage-multi-task-feature-learning},
}