1. On the Anatomy and Physiology of the Retina;Boll;Monatsber. d. Berliner Acad.,1876
2. On the Process of Vision and the Effect of Light on all Substances;Moser;Ann. d. Physik,1842
3. Unters,über den Erregungsvorgang im Nerven- und Muskelsystem;Bernstein,1871
4. On the Doctrine of the Light Sense;Hering;6. Abhandl. Sitzgsber. d. Wiener Acad.,1878
5. De retinae textur. disquis. microsc.;Schmidt;Inaugur, Dissert. Dorpat,1855