@incollection{Musil2022,
  author    = {Musil, Andreas},
  title     = {Art. 21 AEUV [Freiz{\"u}gigkeit]},
  series = {Europ{\"a}isches Steuerrecht : Kommentar},
  booktitle = {Europ{\"a}isches Steuerrecht : Kommentar},
  editor    = {Musil, Andreas and Weber-Grellet, Heinrich},
  edition   = {2},
  publisher = {C.H. Beck},
  address   = {M{\"u}nchen},
  isbn      = {978-3-406-77808-7},
  pages     = {63 -- 66},
  year      = {2022},
  language  = {de}
}