@article{KuSiUll21,
  author = {K{\"u}hn, Thomas and Sickel, Winfried and Ullrich, Tino},
  title = {{H}ow anisotropic mixed smoothness affects the decay of singular numbers of {S}obolev embeddings},
  journal = {J. Complexity},
  fjournal = {Journal of Complexity},
  volume={63},
  year={2021},
  pages={Article No. 101523, 37 pp.},
  doi={10.1016/j.jco.2020.101523},
  url={https://dx.doi.org/10.1016/j.jco.2020.101523}
}