Peter Korosec Jurij Silc A Stigmergy-Based Algorithm for Continuous Optimization Tested on Real-Life-Like Environment. 675-684 2009 EvoWorkshops http://dx.doi.org/10.1007/978-3-642-01129-0_77 conf/evoW/2009 db/conf/evoW/evoW2009.html#KorosecS09