@misc{indiciaef93d99a22a19,
  title = {Prevalent sleep problems in the aged.},
  author = {S Ancoli-Israel and D F Kripke},
  year = {1991},
  doi = {10.1007/bf00999989},
  url = {https://pubmed.ncbi.nlm.nih.gov/1760457/},
  note = {Source identifier: 1760457}
}