[publisher not identified], 1957
Buku Teks
Marian Bubak, editor
[Springer-Verlag, ], 2012
eBooks
editor, Gunter Neubert
Pergamon Press, 1973
Buku Referensi
edited by Karl Hurrle, F.M. Jablonski and Herbert Roth
Pergamon Press, 1972
Buku Referensi
Routledge, 1994
Buku Referensi