Anna Syberfeldt Henrik Grimm Amos Ng Martin Andersson Ingemar Karlsson Simulation-based optimization of a complex mail transportation network. 2625-2631 2008 Winter Simulation Conference http://dx.doi.org/10.1109/WSC.2008.4736377 conf/wsc/2008 db/conf/wsc/wsc2008.html#SyberfeldtGNAK08