Artikel Jurnal
Barlow, Richard E.
Society for Industrial and Applied Mathematics, 1996
eBooks
Edelstein-Keshet, Leah
Society for Industrial and Applied Mathematics, 2005
eBooks
Sheps, Mindel C.
Chicago Press, 1973
Buku Teks SO
edited by Gregory C. Chow and Paolo Corsi
John Wiley & Sons, 1982
Buku Teks