GASSET, AR. Benzalkonium chloride toxicity to human cornea. Am J Ophthalmol. 1977, 84, 169-171
PFISTER, RP. The effect of ophthalmic drugs, vehicles and preservatives on corneal epithelium : A scanning electron microscope study. Invest Ophthalmol Vis Sci. 1976, 15, 246-259
BURSTEIN, NL. Corneal cytotoxicity of topically applied drugs, vehicles and preservatives. Surv Ophthalmol. 1980, 25, 15-30