@article{unknown2012financial,
  title={Financial black swans driven by ultrafast machine ecology},
  author={Neil Johnson and Guannan Zhao and Eric Hunsader and Brian Tivnan and et al.},
  journal={Preprint},
  arXiv={1202.1448},
  journalpage={https://arxiv.org/abs/1202.1448},
  year={2012},
  citations={}
}