Washington, Lawrence C., author
Chapman & Hall/CRC, 2008
Buku Teks
Ireland, Kenneth F., author
Springer-Verlag, 1990
Buku Teks
Weil, Andre
Springer-Verlag , 1973
Buku Teks
Jensen, Michael C.
Praeger, 1972
Buku Teks
Reder, Melvin Waren
Columbia University Press , 1947
Buku Teks