Marco Dorigo Mauro Birattari Christian Blum Maurice Clerc Thomas Stützle Alan F. T. Winfield Ant Colony Optimization and Swarm Intelligence, 6th International Conference, ANTS 2008, Brussels, Belgium, September 22-24, 2008. Proceedings 5217 2008 978-3-540-87526-0 ANTS Conference Lecture Notes in Computer Science Springer db/conf/antsw/ants2008.html