Mohler, 1981, Ophthalmology, 88, 688, 10.1016/S0161-6420(81)34965-3
Fishman, 1993, Ophthalmology, 100, 1665, 10.1016/S0161-6420(93)31420-X
Laatikainen, 1979, Int Ophthalmol, 1, 163, 10.1007/BF00137494
Pierro, 2002, Am J Ophthalmol, 134, 675, 10.1016/S0002-9394(02)01685-9
Cox, 1988, Arch Ophthalmol, 106, 1190, 10.1001/archopht.1988.01060140350030