Ravin, J.G. (2003). "An Indian Adventure: Derrick Vail's Shikarpur Fragments". Archives of Ophthalmology. 121 (5): 720–724. doi:10.1001/archopht.121.5.720. PMID12742853.
Hilding, Anderson (1939). "Mechanics of Prolapse of the Iris in Cataract Operations". Archives of Ophthalmology. 22 (2): 171–176. doi:10.1001/archopht.1939.00860080015001.