scientific article published in September 1865

scientific article published in May 1872

scientific article

three-volume publication (1859–1864) by Paul Ascherson

Second edition of the Flora der Provinz Brandenburg

encyclopedic article

entry in the Allgemeine Deutsche Biographie

encyclopedic article

encyclopedic article

encyclopedic article

entry in the Allgemeine Deutsche Biographie

book (1881) by Gerhard Rohlfs et al.

Berlin : Verlag von Gebrüder Borntraeger 1902

Leipzig : Verlag von Wilhelm Engelmann (Druck von Breitkopf & Härtel in Leipzig) 1907

multivolume publication (1896–1939)