@article{onemethodtorulethemallvariance,
  title = {One Method to Rule Them All: Variance Reduction for Data, Parameters and Many New Methods},
  author = {Filip Hanzely and Peter Richtárik},
  year = {2019},
  eprint = {1905.11266},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1905.11266v2},
}