@misc{cost-development-and-funding-of-health-insurance,
  title   = {Cost Development and Funding of Health Insurance},
  author  = {Leimgruber, Matthieu},
  year    = {2015},
  month   = {jun},
  url     = {https://www.historyofsocialsecurity.ch/articles/topics/financing-models-and-calculation-methods/cost-development-and-funding-of-health-insurance}
}