@misc{pension-funds,
  title   = {Pension Funds},
  author  = {Leimgruber, Matthieu and Hartmann, Lukas},
  year    = {2024},
  month   = {jun},
  url     = {https://www.historyofsocialsecurity.ch/articles/institutions/history-of-social-security-insurance-funds/pension-funds}
}