Frans, Gunther
Germanenrechte Deutsches Bauerntum I Mittelalter
Verlag Germann Boblaus Nadf, 1940
 Buku Teks
Claufsen, Sans Kurt
Germanenrechte Neue Folge Freisinger Rechtsbuch
Verlag German Boblaus Nachf, 1941
 Buku Teks
Lattimore, Owen, 1900-
Studies in frontier history : collected papers 1928-1958
Mouton, 1962
 Buku Teks SO
McGovern, William M.
The early empires of central Asia : a study of the Scythians and the Huns and the part they played in world history with special reference to the Chinese sources
University of North Carolina Press, 1939
 Buku Teks SO
Bloch, Marc
Feudal society = La societe feodale
Routledge, 1971
 Buku Teks SO