@article{Vaisala03,
  title = {A Proof of the Mazur-Ulam Theorem},
  author = {Jussi Väisälä},
  year = {2003},
  url = {http://www.jstor.org/stable/3647749},
  researchr = {https://researchr.org/publication/Vaisala03},
  cites = {0},
  citedby = {0},
  journal = {The American Mathematical Monthly},
  volume = {110},
  number = {7},
  pages = {633-635},
}