@misc{indiciaec967bd9c040d,
  title = {A simplified silver impregnation method.},
  author = {J L Velayos and M F Lizarraga},
  year = {1973},
  doi = {10.1007/bf01913300},
  url = {https://pubmed.ncbi.nlm.nih.gov/4125752/},
  note = {Source identifier: 4125752}
}