@misc{indiciae213eb1927fb3,
  title = {Climbing the co-evolution ladder.},
  author = {T M Lenton and H J Schellnhuber and E Szathmáry},
  year = {2004},
  doi = {10.1038/431913a},
  url = {https://pubmed.ncbi.nlm.nih.gov/15496901/},
  note = {Source identifier: 15496901}
}