@misc{indiciaed0b3b802c275,
  title = {Necessary conditions for density classification by cellular automata.},
  author = {M S Capcarrère and M Sipper},
  year = {2001},
  doi = {10.1103/physreve.64.036113},
  url = {https://pubmed.ncbi.nlm.nih.gov/11580400/},
  note = {Source identifier: 11580400}
}