Courant, R., author
Blackie and Son Ltd., 1960
Buku Teks
Love, Clyde E., author
Macmillan, 1943
Buku Teks
Ayres, Frank, 1901-1994, author
McGraw-Hill, 1981
Buku Teks
Piskunov, N.S. (Nikolai Semenovich), author
Mir, 1974
Buku Teks
Piskunov, N.S. (Nikolai Semenovich), author
Mir, 1981
Buku Teks