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2. Further observation on superficial punctate keratitis;Thygeson;Am. J. Ophthalmol,1961
3. Therapeutic uses of hydrophilic contact lenses;Gasset;Am. J. Ophthalmol,1970
4. Corneal disease and soft contact lenses;Gasset;Ophthalmol. Digest,1974
5. Thygeson's superficial punctate keratitis;Sundmacher;Klin. Monatsbl. Augenheilkd.,1977