Marco Baioletti Alfredo Milani Valentina Poggioni Fabio Rossi An ACO Approach to Planning. 73-84 2009 EvoCOP http://dx.doi.org/10.1007/978-3-642-01009-5_7 conf/evoW/2009cop db/conf/evoW/evocop2009.html#BaiolettiMPR09