edited by R.W. Lewis
Pineridge Press, 1979
Buku Teks
editors, C. Taylor, E. Hinton, D.R.J. Owen
Pineridge Press, 1980"
Buku Teks
Society for Industrial and Applied Mathematics, 1996
eBooks
Keller, Herbert B.
"Waltham, Massachusetts Blaisdell Pub., 1968",
Buku Teks
Saad, Youcef, editor
Halsted Press, 1992
Buku Teks SO