@misc{indiciae36eaa721d25a,
  title = {Gingival sulcus bleeding--a leading symptom in initial gingivitis.},
  author = {H R Mühlemann and S Son},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5315729/},
  note = {Source identifier: 5315729}
}