Dubois, Didier, author
Academic Press, 1980
Buku Teks
Klir, George J., author
Prentice-Hall, 1995
Buku Teks
Atanassov, Krassimir T., author
[Springer, Springer], 2012
eBooks
Klir, George J., author
Prentice-Hall, 1988
Buku Teks
Academic Press, 1975
Buku Teks