1. The occurrence of retraction movements of the eyeball together with congenital defects in the external ocular muscles;Wolff;Arch Ophthalmol,1900
2. Paresen der Schragen Heber, V. Graefes;Jaensch;Arch Ophthalmol,1929
3. Symposium on strabismus;Jampolsky,1971
4. The prevention of over-correction and under-correction in horizontal strabismus surgery;Schillinger;J Pediatr Ophthalmol,1966
5. Quantitative forced ductions;Stephens;Trans Amer Acad Ophthalmol Otolaryngoi,1967