Lorin, Harold, author
John Wiley & Sons, 1980
Buku Teks
Sloman, Morris, author
Prentice-Hall, 1987
Buku Teks
Lions, J.L., author
Society for Industrial and Applied Mathematics, 1972
eBooks
Champine, George A., author
North Holland, 1980
Buku Teks
London, Keith R., author
McGraw-Hill, 1976
Buku Teks