Markov, G., author
Progress Publishers, 1965
Buku Teks
Markov, G., author
Mir, [Date of publication not identified]
Buku Teks
Goodman, David J., author
Addison-Wesley , 1997
Buku Teks
edited by William H. Tranter [and others]
Kluwer Academic, 1999
Buku Teks
Longley, Dennis, author
Macmillan, 1986
Buku Referensi