Alexander Scheidler Christian Blum Daniel Merkle Martin Middendorf Emergent Sorting in Networks of Router Agents. 299-306 2008 ANTS Conference http://dx.doi.org/10.1007/978-3-540-87527-7_30 conf/antsw/2008 db/conf/antsw/ants2008.html#ScheidlerBMM08