@misc{introduction-of-the-residential-principle-in-social-welfare,
  title   = {Introduction of the Residential Principle in Social Welfare},
  author  = {Germann, Urs},
  year    = {2014},
  month   = {jun},
  url     = {https://www.historyofsocialsecurity.ch/timeline/expansion-and-consolidation-of-the-welfare-state/introduction-of-the-residential-principle-in-social-welfare}
}