@article{wilke01,
  author={Claus O. Wilke and Jia Lan Wang and Charles Ofria and Richard E. Lenski and Christoph Adami},
  title={Evolution of digital organisms at high mutation rates leads to survival of the flattest},
  journal={Nature},
  year={2001},
  volume={412},
  number={19},
  pages={331--333},
  month={July}
}