@misc{indiciaeb1960ea456d5,
  title = {Persistent visual changes following hashish consumption.},
  author = {G L Laffi and A B Safran},
  year = {1993},
  doi = {10.1136/bjo.77.9.601},
  url = {https://pubmed.ncbi.nlm.nih.gov/8218063/},
  note = {Source identifier: 8218063}
}