@inproceedings{ZhangGS2015,
  title = {Multi-Source Domain Adaptation: A Causal View},
  booktitle = {Proceedings of the Twenty-Ninth {AAAI} Conference on Artificial Intelligence},
  pages = {3150-3157},
  publisher = {{AAAI} Press},
  year = {2015},
  author = {Zhang, K. and Gong, M. and Sch{\"o}lkopf, B.},
  url = {http://www.aaai.org/ocs/index.php/AAAI/AAAI15/paper/view/10052/9994}
}