Ackerman, Robert
Cambridge University Press , 1990
Buku Teks
Posener, Julius, author
MIT Pres, 1992
Buku Teks
Cannell, D.M., author
Society for Industrial and Applied Mathematics, 2001
eBooks
Enan, M.A.
Ashraf, 1946
Buku Teks
Kay, Dennis, author
Twayne, 1995
Buku Teks