@misc{indiciae9919025c359d,
  title = {[Root fissure--a periodontal problem].},
  author = {N Berghagen and J Bergström and H Evers},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4525371/},
  note = {Source identifier: 4525371}
}