@misc{indiciaeed544ecb438d,
  title = {Optical mode in tilted hexatics.},
  author = {HR Brand and H Pleiner},
  year = {1987},
  doi = {10.1103/physrevlett.59.2822},
  url = {https://pubmed.ncbi.nlm.nih.gov/10035660/},
  note = {Source identifier: 10035660}
}