1. Clinical Neuro-ophthalmology;Walsh,1957
2. Lid retraction syndrome due to secondary deviation;Lewallen;Am J Ophthalmol,1958
3. Hering's law, the levators, and their relationship in disease states;Gay;Arch Ophthalmology,1967
4. Anatomy and physiology of eye movements;Wright,2002
5. Ptosis with contralateral lid retraction due to excessive innervation of the levator palpebrae superiorus;Schechter;Ann Ophthalmol,1978