1. Chapter 12;Carroll,1865
2. Tear film physiology;Holly;Internat Ophthalmol Clin,1987
3. Tear physiology and dry eyes;Holly;Surv Ophthalmol,1977
4. Clinical diagnosis of the dry eye;Whitcher;Internat Ophthalmol Clin,1987
5. Lacrimal Gland, Tear Film and Dry Eye Syndromes: Basic Science and Clinical Relevance,1994