@misc{indiciaec00d3c4dab3e,
  title = {Preservatives in eye drops.},
  author = {R Barkman and M Germanis and G Karpe and S Malmborg},
  year = {1969},
  doi = {10.1111/j.1755-3768.1969.tb08132.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4899981/},
  note = {Source identifier: 4899981}
}