1. Beldiceanu, N., Carlsson, M., Rampon, J.X.: Global constraint catalog. SICS Research Report (2005)
2. Lecture Notes in Computer Science;B. Kell,2013
3. Garey, M.R., Johnson, D.S.: Computers and intractability. Freeman, New York (1979)
4. Gecode Team. Gecode: Generic constraint development environment (2013),
http://www.gecode.org
5. Martello, S., Toth, P.: Knapsack problems: algorithms and computer implementations. John Wiley & Sons, Inc. (1990)