@misc{indiciae7558efb9eab0,
  title = {Adaptive learning by extremal dynamics and negative feedback.},
  author = {P Bak and D R Chialvo},
  year = {2001},
  doi = {10.1103/physreve.63.031912},
  url = {https://pubmed.ncbi.nlm.nih.gov/11308683/},
  note = {Source identifier: 11308683}
}