@inproceedings{muller2009composite,
  title={A composite calculation for author activity in wikis: Accuracy needed},
  author={Muller-Birn, Claudia and Lehmann, Janette and Jeschke, Sabina},
  booktitle={Proceedings of the IEEE/WIC/ACM International Joint Conference on Web Intelligence and Intelligent Agent Technology},
  pages={84--91},
  year={2009},
  organization={IEEE Computer Society}
}