@PROCEEDINGS{lncs:ants2004,
TITLE = {Proceedings of ANTS 2004 -- Fourth International Workshop on Ant Colony Optimization and Swarm Intelligence},
YEAR = 2004,
EDITOR = {M.~Dorigo and M.~Birattari and C.~Blum and L.~M.~Gambardella and F.~Mondada and T.~St{\"u}tzle},
VOLUME = {3172},
SERIES = {Lecture Notes in Computer Science},
PUBLISHER = {Springer Verlag, Berlin, Germany}
}