1. Anderton S, Hitchings RA: A comparative study of visual fields of patients with low tension glaucoma and those with chronic simple glaucoma. In: Greve EL, Heijl A (eds) 5th international visual field symposium, pp. 90–97. Dr W Junk Publ, Dordrecht, 1983.
2. Aulhorn E, Karmeyer H: Frequency distribution in early glaucomatous visual field defects. Doc Ophthalmol Proc Ser 14: 75–83 (1977).
3. Aulhorn E, Tanzil M, Litricin V: Vergleich der Gesichtsfeldausfälle bei der Apoplexia papillae und beim Glaukom. Ber Dtsch Ophthalmol Ges 76: 663–640 (1979).
4. Bebie H, Fankhauser F: Delta manual. Interzeag AG, Schlieren, Switzerland, 1982.
5. Caprioli J, Spaeth GL: Comparison of visual field defects in the low-tension glaucomas with those in the high-tension glaucoma. Am J Ophthal 97: 730–737 (1984).