Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Lobin, Henning, Andreas Witt & Angelika Wöllstein (Hgg.)(2021), Deutsch in Europa. Sprachpolitisch–grammatisch–methodisch. Berlin/Boston: Walter de Gruyter.(IDS Leibniz Institut für Deutsche Sprache, Jahrbuch 2020)