@misc{pwq-parti-ecologiste-suisse-pes,
  title   = {{Parti écologiste suisse (PES)}},
  author  = {},
  year    = {},
  month   = {},
  url     = {https://www.histoiredelasecuritesociale.ch/artikel/rxz-les-institutions/dvv-histoire-de-la-securite-sociale-partis-politiques/pwq-parti-ecologiste-suisse-pes}
}