1. Nuove sperienze fatte sull’ occhio umano;Buzzi;Opuscoli Scetti Sulle Scienze e Arti.,1782
2. An account of the orifice in the retina of the human eye, discovered by Professor Soemmering. To which are added, proofs of this appearance being extended to the eyes of other animals;Home;Philos Trans Roy Soc London,1798
3. Die farbe der macula centralis retinae;Gullstrand;Albrecht von Graefes Arch Ophthalmol.,1906
4. Sur la lache jaune de la retine at son influence sur la vue normale et sur les anomalies de la perception des coleurs (traduit par Leber);Schültze;J d’Anat et de Physiol de Ch Robin,1866
5. The relation between visual acuity and illumination;Shlaer;J Gen Physiol.,1937