@misc{indiciae550745b24156,
  title = {Tear flow analysis through the upper and lower systems.},
  author = {J Daubert and N Nik and P A Chandeyssoun and L el-Choufi},
  year = {1990},
  doi = {10.1097/00002341-199009000-00008},
  url = {https://pubmed.ncbi.nlm.nih.gov/2268613/},
  note = {Source identifier: 2268613}
}