Ordeshook, Peter C.
Routledge, 1992
Buku Teks SO
Key, V. O. (Valdimer Orlando), 1908-1963
Thomas Y. Crowell, 1954
Buku Teks
Smith, Kevin
Westview Press, Boston, Massachusetts : Credo Reference, 2013
Buku Teks
Scherer, Stefan
Springer-Verlag, 2012
eBooks
Speyer, Jason Lee
Society for Industrial and Applied Mathematics, 2010
eBooks