References
- Lang J: Strabismus. Translated by GW Cibis, Thorofare, N.J., SLACK Inc. 1984.
- Hugonier R, Hugonier SC: Strabismus, Heterophoria, Ocular Motor Paralysis, Clinical Ocular Muscle Imbalance. Translated by Suzanne Verouneau-Troutman, St. Louis, C.V. Mosby Co., 1969.