MathSciDoc: An Archive for Mathematician ∫

@inproceedings{jan-erik1969on,
  title={On extensions of Lipschitz functions},
  author={Jan-Erik Björk},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203441601852104},
  booktitle={Arkiv for Matematik},
  volume={7},
  number={6},
  pages={513-515},
  year={1969},
}