@article{areviewofsinglesourceunsuperviseddomain,
  title = {A review of domain adaptation without target labels},
  author = {Wouter M. Kouw and Marco Loog},
  year = {2019},
  eprint = {1901.05335},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1901.05335v2},
}