@misc{indiciaeda8a4bd50009,
  title = {The evolution of hydrogel implants.},
  author = {G D Barrett},
  year = {1991},
  doi = {10.1159/000419903},
  url = {https://pubmed.ncbi.nlm.nih.gov/1936457/},
  note = {Source identifier: 1936457}
}