Nazareth, John Lawrence
Oxford University Press, 1987
Buku Teks SO
Crouch, Ralph
Scott, Foresman, 1966
Buku Teks SO
George, Alan
Prentice-Hall, 1981
Buku Teks SO
Springer-Verlag, 1991
Buku Teks SO
Barrett, Richard
Society for Industrial and Applied Mathematics, 1994
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