1. European Strabismological Association (ESA). Terminology.Oculus.Wetzlar, D6300.
2. Lang J.Strabismus (4th Edition).Huber H (Ed.). Berne, Switzerland (1995).
3. Roth A, Speeg-Schatz CL.Eye Muscle Surgery. Basic Data, Operative Techniques, Surgical Strategy.Swets & Zeitlinger, Lisse, Netherlands, 53 (2001).
4. Spielmann A.Les Strabismes. De l’;analyse Clinique à la Synthèse Chirurgicale. (2nd Edition).Masson, Paris, France (1991).
5. Cüppers C. The so-called “Fadenoperation” (Surgical corrections by well defined changes of the arc of contact). In:II. Symp. I.S.AFells P. (Ed.). Diffusion Générale de Librairie, Marseille, Paris, 395–400 (1976).