Hall, James E.
Brooks/Cole, 1971
Buku Teks
Zelinsky, Daniel
Academic Press, 1968
Buku Teks
Buchanan, Herbert E.
Houghton Mifflin, 1928
Buku Teks
Leffler, John E.
Macmillan, 1973
Buku Teks
Ortega, James M., 1932-
Society for Industrial and Applied Mathematics, 1990
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