1. Management of Paralytic Strabismus;Fells;Br J Ophthalmol,1974
2. Superior oblique paralysis;von Noorden;Arch Ophthalmol,1986
3. Vertical strabismus surgery;Jampolsky,1971
4. Estrabismo;Prieto Diaz,2005
5. A new look at the head tilt test;Jampolsky,1994