@misc{indiciaeda2315c6c298,
  title = {Phosphoric acid penetration during direct bonding.},
  author = {R S Smith and J A Spinelli and D J Tartakow},
  year = {1976},
  doi = {10.1016/0002-9416(76)90278-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/790972/},
  note = {Source identifier: 790972}
}