@misc{indiciaeb892de05bc8f,
  title = {Simple physical activities for the elderly.},
  author = {R L Comstock and R L Mayers and J C Folsom},
  year = {1969},
  doi = {10.1176/ps.20.12.377},
  url = {https://pubmed.ncbi.nlm.nih.gov/5351716/},
  note = {Source identifier: 5351716}
}