@misc{indiciaee061a409e7ba,
  title = {Frequency variability in the aged voice.},
  author = {B J Benjamin},
  year = {1981},
  doi = {10.1093/geronj/36.6.722},
  url = {https://pubmed.ncbi.nlm.nih.gov/7299089/},
  note = {Source identifier: 7299089}
}