@InProceedings{GroDor04:ppsn,
  author = 	 {R.~Gro{\ss} and M.~Dorigo},
  title = 	 {Group Transport of an Object to a Target that Only Some Group Members May Sense},
  booktitle =	 {Parallel Problem Solving from Nature -- 8th International Conference (PPSN VIII)},
  pages =	 {852--861},
  year =	 2004,
  volume =	 3242,
  series =	 {Lecture Notes in Computer Science},
  publisher =	 {Springer Verlag, Berlin, Germany}
}