@misc{indiciaed16d9b3d4e60,
  title = {Mandibular first premolar with three root canals.},
  author = {M Hülsmann},
  year = {1990},
  doi = {10.1111/j.1600-9657.1990.tb00416.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2133309/},
  note = {Source identifier: 2133309}
}