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2. Roentgen ray demonstrations of the lacrimal abscess cavity;Ewing;Am. J. Ophth.,1909
3. Handbuch der mikroskopischen Anatomie des Menschen;Rohen,1964
4. Tear secretion in diseased eyes. Keratoconjunctivitis sicca, diseases of the lacrimal system, ectropion, lagophthalmos, conjunctivitis, etc., studied by a new method: Lacrimal streak dilution test;Norn;Acta Ophth.,1966
5. Determination of tear volume and tear flow;Mishima;Invest. Ophth.,1966