@misc{indiciaec488a00e6966,
  title = {Cigarette smoking associated with sleep difficulty.},
  author = {C R Soldatos and J D Kales and M B Scharf and E O Bixler and A Kales},
  year = {1980},
  doi = {10.1126/science.7352268},
  url = {https://pubmed.ncbi.nlm.nih.gov/7352268/},
  note = {Source identifier: 7352268}
}