@misc{indiciae6d3f32e4fe3c,
  title = {Maximum duration of phonation.},
  author = {P H PTACEK and E K SANDER},
  year = {1963},
  doi = {10.1044/jshd.2802.171},
  url = {https://pubmed.ncbi.nlm.nih.gov/13972416/},
  note = {Source identifier: 13972416}
}