@article{almaas2004global,
  title={Global organization of metabolic fluxes in the bacterium Escherichia coli},
  author={Almaas, E and Kovacs, B and Vicsek, T and Oltvai, ZN and Barab{\'a}si, A-L},
  journal={Nature},
  volume={427},
  number={6977},
  pages={839--843},
  year={2004},
  publisher={Nature Publishing Group}
}