1. R.K. Ahuja, T.L. Magnanti, T.L. Orlin, Network Flows: Theory, Algorithms, and Applications. Prentice-Hall, London, 1993.
2. J. Antes, Structuring the process of airline scheduling. WINFORS Working Paper, University of Cologne, Germany, 1997, URL: http://www.informatik.uni-koeln.de/winfors/pub/ja-sor97-1.ps.
3. Carlson, E., An Approach for Designing Decision Support Systems, Data Base 11, 1979.
4. CPLEX, Using the CPLEX Callable Library, Version 4.0, CPLEX Optimization, Suite 279, 930 Tahoe Blvd., Bldg. 802, Incline Village, NV 89451-9436, USA, 1989.
5. Decomposition principle for linear programs;Dantzig;Operations Res.,1960