100。Combining a memetic algorithm with integer programming to solve the prize- collecting Steiner tree problem, (with G. Klau, I. Ljubic, A. Moser, P. Mutzel, P. Neuner, G. Raidl, R. Weiskircher), Proceedings of the GECCO Genetic and Evolutionary Computation Conference, Seattle, 2004, Springer Lecture Notes in Computer Science 3102 , 1304–1315,2004。