@article{estimatingthehistoricalandfuture,
  title = {Estimating the historical and future probabilities of large terrorist events},
  author = {Aaron Clauset and Ryan Woodard},
  year = {2012},
  eprint = {1209.0089},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1209.0089v3},
}