Springer, 2012
eBooks
Rothstein, Andrew, author
Penguin Books , 1950
Buku Teks
Riasanovsky, Nicholas V., author
Oxford University Press, 1963
Buku Teks
Garder, Michel
Frederick A. Praeger, 1966
Buku Teks
translated by George H. Hanna
Foreign Languages Publishing House, 1960
Buku Teks