@article{blount2008historical,
  author={Blount, Z.D. and Borland, C.Z. and Richard E. Lenski},
  title={Historical contingency and the evolution of a key innovation in an experimental population of Escherichia coli},
  journal={Proceedings of the National Academy of Sciences},
  year={2008},
  volume={105},
  number={23},
  pages={7899}
}