@misc{indiciae3d1841be8bcf,
  title = {Acoustic C},
  author = {G Tupper},
  year = {1987},
  doi = {10.1103/physrevb.36.5574},
  url = {https://pubmed.ncbi.nlm.nih.gov/9942201/},
  note = {Source identifier: 9942201}
}