@misc{indiciaefae8689831e1,
  title = {[The initial lesion in ulcerative gingivitis].},
  author = {E Plüss and K H Rateitschak},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5282641/},
  note = {Source identifier: 5282641}
}