D. Merkle, M. Middendorf
Dynamic Polyethism in Social Insect Societies - A Simulation Study
Proceedings of the 2nd International Workshop on the Mathematics and Algorithms of Social Insects, Georgia Institute of Technology, 99-106, 2003.

M. Guntsch, M. Middendorf
Solving Multi-Objective Permutation Problems with Population Based ACO
Proceedings of the Second International Conference on Evolutionary Multi-Criterion Optimization (EMO 2003), C.M. Fonseca, P.J. Fleming, E. Zitzler, K. Deb, L. Thiele (Eds.), Springer, LNCS 2636, 2003, 464-478.