Frauenthal, J.C.
Springer-Verlag, 1980
Buku Teks
Rideout, Vincent C.
Prentice Hall International, 1991
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Brauer, Fred, author
Springer Science, 2012
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Bender, Edward A., author
John Wiley & Sons, 1978
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Micchelli, Charles A., author
Society for Industrial and Applied Mathematics, 1995
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