edited by Reiner Horst, Panos M. Pardalos
Kluwer Academic Publishers, 1995
Buku Referensi
Makela, Marko M.
World Scientific, 1992
Buku Teks
Papadimitriou, Christos H., author
Prentice Hall of India, 1997
Buku Teks
Gregory, John, author
Van Nostrand Reinhold, 1992
Buku Teks
Denn, Morton M.
McGraw-Hill, 1969
Buku Teks