@inproceedings{heterogeneousmultitasklearningwithjoint,
  title = {Heterogeneous multitask learning with joint sparsity constraints},
  author = {Xiaolin Yang and Seyoung Kim and Eric P. Xing},
  year = {2009},
  booktitle = {NeurIPS 2009 12},
  url = {http://papers.nips.cc/paper/3706-heterogeneous-multitask-learning-with-joint-sparsity-constraints},
}