Ayres, Frank, 1901-1994, author
McGraw-Hill, 1981
Buku Teks
Courant, R., author
Blackie and Son Ltd., 1960
Buku Teks
Edwards, Harold M., author
Birkhauser, 1993
Buku Teks
Williamson, Richard E.
Prentice-Hall, 1979
Buku Teks
Magnus, Jan R.
John Wiley & Sons, 1999
Buku Teks