Perry, Henry D.; Donnenfeld, Eric D. (בדצמבר 2003). "Medications for dry eye syndrome: a drug-therapy review". Managed Care (Langhorne, Pa.). 12 (12 Suppl): 26–32. ISSN1062-3388. PMID14723111. {{cite journal}}: (עזרה)
Perry, Henry D.; Donnenfeld, Eric D. (בדצמבר 2003). "Medications for dry eye syndrome: a drug-therapy review". Managed Care (Langhorne, Pa.). 12 (12 Suppl): 26–32. ISSN1062-3388. PMID14723111. {{cite journal}}: (עזרה)