1. The Innervation of Muscle;BOEKE, J.;Z. mikr.-anat. Forsch; Degeneration and Regeneration of the Nervous System,1925
2. REXED, B., and REXED, U. (1951). Brit. J. Ophthal., 35, 38.
3. VRABEC, FR. (1955). Ophthalmologica (Basel), 130, 24.
4. Quoted by Cajal;WALLER, A.;Arch. Anat. Physiol. wiss. Med; Quoted by Coers and Woolf,1852
5. v;WALLER, A.;Graefes Arch. Ophthal,1956