Jakubec, Jan
Leipzig C.F. Amelangs verlag 1907
Buku Teks
Stuttgart : Philipp Reclam Jun, 1974
Buku Teks
Tenbrock, Robert-Hermann, author
Schoningh, 1970
Buku Teks
Wehr, Hans, 1909-1981, author
Otto Harrassowitz, 1959
Buku Referensi
Stuttgart Steinkopf 1960
Buku Teks