@article{improvabilitythroughsemisupervised,
  title = {Improvability Through Semi-Supervised Learning: A Survey of Theoretical Results},
  author = {Alexander Mey and Marco Loog},
  year = {2019},
  eprint = {1908.09574},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1908.09574v3},
}