@InProceedings{HolKosMaaTaeub03,
  author = 	 {Klaus Holzapfel and Sven Kosub and Moritz
                  G. Maa{\ss} and Hanjo T{\"a}ubig},
  title = 	 {The Complexity of Detecting Fixed-Density Clusters},
  booktitle = 	 {Proceedings of the 5th Italian Conference on Algorithms and Complexity ({CIAC})},
  pages =	 {201-212},
  year =	 2003,
  volume =	 2653,
  series =	 {LNCS},
  publisher =	 {Springer}
}