@incollection{Czychowski2021,
  author    = {Christian Czychowski},
  title     = {\S 9 Werkarten C. Musikwerke},
  booktitle = {Handbuch des Urheberrechts},
  edition   = {3},
  editor    = {Ulrich Loewenheim},
  isbn      = {978-3-406-72083-3},
  url       = {https://beck-online.beck.de/Bcid/Y-400-W-LoewenheimHdbUrhR-GL-sect9-C},
  year      = {2021},
}