@article{huynen1996smoothness,
  author={Huynen, M.A. and Stadler, P.F. and Fontana, W.},
  title={Smoothness within ruggedness: The role of neutrality in adaptation},
  journal={Proceedings of the National Academy of Sciences},
  year={1996},
  volume={93},
  number={1},
  pages={397}
}