@article{unknown2011pattern,
  title={Pattern in escalations in insurgent and terrorist activity},
  author={Neil Johnson and Spencer Carran and Joel Botner and Brian Tivnan and et al.},
  journal={Science},
  volume={333},
  pages={81-84},
  journalpage={http://science.sciencemag.org/content/333/6038/81},
  year={2011},
  citations={}
}