edited by R.W. Lewis
Pineridge Press, 1979
Buku Teks SO
Birkhoff, Garrett
Society for Industrial and Applied Mathematics, 1984
eBooks
editors, C. Taylor, E. Hinton, D.R.J. Owen
Pineridge Press, 1980"
Buku Teks SO
Society for Industrial and Applied Mathematics, 1996
eBooks
Keller, Herbert B.
"Waltham, Massachusetts Blaisdell Pub., 1968",
Buku Teks