1. Network flows. Theory, algorithms, and applications;Ahuja,1993
2. Artificial intelligence based approaches for solving hierarchical optimization problems;Anandalingam,1989
3. Practical bilevel optimization. Algorithms and applications;Bard,1998
4. An algorithm for the discrete bilevel programming problem;Bard;Naval Research Logistics,1992
5. Ant colony optimization techniques for the vehicle routing problem;Bell;Advanced Engineering Informatics,2004