Gallagher, John P.
Prentice-Hall, 1988
Buku Teks
Negoita, Constantin Virgil, author
The Benjamin Cumming Pub., 1985
Buku Teks
Ferguson, John Alexander
National Library of Australia, 1975
Buku Referensi
Maus, Rex., editor
McGraw-Hill, 1991
Buku Referensi
Shafer, Glenn, author
Society for Industrial and Applied Mathematics, 1996
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