Butler, S. T.
Horwitz, 1960
Buku Teks
Yavorsky, B.M.
Moscow : Mir Publishers, c1979
Buku Teks
Jesse, Kenneth E., author
Harcourt Brace Jovanovich, 1987
Buku Teks
Gambhir, R.S., author
McGraw-Hill, 1980
Buku Teks
Marsden, Jerrold E., author
Society for Industrial and Applied Mathematics, 1981
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