"Die Raumgliederungen der Schweiz 2016" (in German, French, Italian, and English). Neuchâtel, Switzerland: Swiss Federal Statistical Office. 17 February 2016. Archived from the original on 18 July 2018. Retrieved 14 December 2016.
"Die Raumgliederungen der Schweiz 2016" (in German, French, Italian, and English). Neuchâtel, Switzerland: Swiss Federal Statistical Office. 17 February 2016. Archived from the original on 18 July 2018. Retrieved 14 December 2016.