@misc{johann-jakob-kummer,
  title   = {Johann Jakob Kummer},
  author  = {Lengwiler, Martin},
  year    = {2014},
  month   = {jun},
  url     = {https://www.histoiredelasecuritesociale.ch/articles/les-protagonistes/histoire-de-la-securite-sociale-dirigeants-de-ladministration/johann-jakob-kummer}
}