1. Natural selection and the origin and evolution of weeping in man;Montague;J. A. M. A.,1960
2. Psychosomatic Ophthalmology;Schlaegel,1957
3. The expression of the emotions in man and animals;Darwin,1872
4. Transactions of Heidelberg Ophthalmological Congress;Axenfeld,1898
5. The lacrimal system, clinical application;Viers,1955