Waltman, Paul
Society for Industrial and Applied Mathematics, 1983
eBooks
Taylor, Paul M.
Sweet &Maxwell, 1999
Buku Teks
Keedy, Mervin L.
Addison-Wesley, 1966
Buku Teks SO
edited by Brian L. Keeley
Cambridge University Press, 2006
Buku Teks
Siahaan, Janpie
Salemba Empat, 2009
Buku Teks