Bernd Scheuermann Michael Guntsch Martin Middendorf Hartmut Schmeck Time-Scattered Heuristic for the Hardware Implementation of Population-Based ACO. 250-261 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3172&spage=250 2004 conf/antsw/2004 ANTS Workshop db/conf/antsw/antsw2004.html#ScheuermannGMS04