Berg, Rene van den
Foris Publications, 1989
Buku Teks
Marsden, William
Oxford University Press, 1984
Buku Referensi
Kapliwatzky, Jochanan
Rubin Mass, 1954
Buku Referensi
Parrot, Martin
Cambridge University Press, 2003
Buku Teks
Thatcher, G.W.
Frederick Ungar, [Date of publication not identified]
Buku Teks