@inproceedings{KaltenbrunnerWS2009,
  author =	 {Kaltenbrunner, A. and Gonzalez-Bailon, S. and
                  Banchs, R. E.},
  title =	 {Communities on the Web: Mechanisms Underlying the 
  		  Emergence of Online Discussion Networks},
  booktitle =	 {WebSci'09: Society On-Line},
  year =	 2009,
  location =	 {Athens, Greece}
}