Zi cai Li
World Scientific, 1990
Buku Teks
edited by R.W. Lewis
Pineridge Press, 1979
Buku Teks
Birkhoff, Garrett, author
Society for Industrial and Applied Mathematics, 1984
eBooks
editors, C. Taylor, E. Hinton, D.R.J. Owen
Pineridge Press, 1980"
Buku Teks
Society for Industrial and Applied Mathematics, 1996
eBooks