Katzner, Kenneth, author
John Wiley & Sons, 1994
Buku Referensi
Golovinsky, M., author
David Mckay, [date of publication not identified]
Buku Referensi
Texnika, 1993
Buku Referensi
Borovkov, K.A., author
Society for Industrial and Applied Mathematics, 1994
eBooks
O`brien, M.A., author
George Allen and Unwin, 1930
Buku Referensi