@book{dz-d-14.04.01-chop20-sys-01, school = {BFS}, month = {Jul}, language = {DE}, title = {Schweizerische Operationsklassifikation CHOP 2020 - Systematisches Verzeichnis}, institution = {Bundesamt für Statistik (BFS)}, number = {9286160}, url = {https://www.bfs.admin.ch/hub/api/dam/assets/9286160/master} }