@article{optimalsamplingdensityfornonparametric,
  title = {Optimal Sampling Density for Nonparametric Regression},
  author = {Danny Panknin and Klaus Robert Müller and Shinichi Nakajima},
  year = {2021},
  eprint = {2105.11990},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2105.11990v2},
}