@misc{indiciae204582c67fc7,
  title = {The Creatures global digital ecosystem.},
  author = {D Cliff and S Grand},
  year = {1999},
  doi = {10.1162/106454699568683},
  url = {https://pubmed.ncbi.nlm.nih.gov/10421678/},
  note = {Source identifier: 10421678}
}