Haasis, H., Kopfer, H., & Schnberger, J. (2006). Operations Research Proceedings 2005: Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Bremen, September 79, 2005. Springer Berlin Heidelberg. https://doi.org/10.1007/3-540-32539-5

Haasis, Hans-Dietrich, Herbert Kopfer, and Jrn Schnberger. Operations Research Proceedings 2005: Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Bremen, September 79, 2005. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. https://doi.org/10.1007/3-540-32539-5.

Haasis, Hans-Dietrich, et al. Operations Research Proceedings 2005: Selected Papers of the Annual International Conference of the German Operations Research Society (GOR), Bremen, September 79, 2005. Springer Berlin Heidelberg, 2006. https://doi.org/10.1007/3-540-32539-5.