@misc{indiciaea0a108175312,
  title = {Topological defects of wave patterns.},
  author = {P Coullet and C Elphick and L Gil and J Lega},
  year = {1987},
  doi = {10.1103/physrevlett.59.884},
  url = {https://pubmed.ncbi.nlm.nih.gov/10035897/},
  note = {Source identifier: 10035897}
}