1. Conjunctival goblet cell density in normal subjects and in dry eye syndromes;Ralph;Invest. Ophthalmol,1975
2. Mucous gland system of the conjunctiva. A quantitative normal anatomic study;Kessing;Acta Ophthalmol. suppl.,1968
3. Conjunctival smear cytology in xerosis;Agarwal;Acta Ophthalmol,1955