@article{knight:variation,
  title = "Association of parameter, software, and hardware variation with large-scale behavior across 57,000 climate models",
  author = "Christopher G. Knight and Sylvia H. E. Knight and Neil Massey and Tolu Aina and Carl Christensen and Dave J. Frame and Jamie A. Kettleborough and Andrew Martin and Stephen Pascoe and Ben Sanderson and David A. Stainforth and Myles R. Allen",
  year = "2007",
  journal = "Proceedings of the National Academy of Sciences in the United States of America",
  month = "jul",
  number = "30",
  pages = "12259--12264",
  volume = "104",
  doi = "10.1073/pnas.0608144104",
}