@misc{indiciae309dc044e637,
  title = {[A Russian three-mirror gonioscope].},
  author = {M A Pen'kov and N M Avrushchenko},
  year = {1986},
  url = {https://pubmed.ncbi.nlm.nih.gov/3822345/},
  note = {Source identifier: 3822345}
}