Schirmer, Alfred
Berlin Walter de Gruyter 1919
Buku Teks
Iskos, A.
Leningrad Leningrader Abteilung 1963
Buku Referensi
Paul, Hermann, 1846-1921, author
Tubingen Max Niemeyer 1951
Buku Teks
Frings, Theodor
Halle Max Niemeyer 1957
Buku Teks
Berlin Wolter de Gruhter 1939
Buku Referensi