@article{optimallycombiningclassifiersusing,
  title = {Optimally Combining Classifiers Using Unlabeled Data},
  author = {Akshay Balsubramani and Yoav Freund},
  year = {2015},
  eprint = {1503.01811},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1503.01811v3},
}