References
- Allen, James H., ed.: Strabismus Ophthalmic Symposium II, St. Louis, C. V. Mosby, 1958.
- Duke-Elder, W. Stewart: Text-Book of Ophthalmology, vol. IV, Noncomitant Squint. St. Louis, C. V. Mosby, 1949. pp. 3875, 4040–4062.
- MacLean, Florence M.: Diagnostic orthoptics. In Symposium: Office Orthoptics by the Ophthalmologist, Amer Orthopt J, 9:10–16, 1959.
- Tabor, George L., Jr.: Diagnosis of vertical muscle palsies, Amer Orthopt J, 8:86–92, 1958.