Ruskell, G. L. (1973). "Sympathetic innervation of the ciliary muscle in monkeys". Experimental Eye Research. 16 (3): 183–90. doi:10.1016/0014-4835(73)90212-1. PMID4198985.
Fleming, David G.; Hall, James L. (1959). "Autonomic Innervation of the Ciliary Body: A Modified Theory of Accommodation". American Journal of Ophthalmology. 48 (3): 287–93. doi:10.1016/0002-9394(59)90269-7. PMID13823443.
Ruskell, G. L. (1973). "Sympathetic innervation of the ciliary muscle in monkeys". Experimental Eye Research. 16 (3): 183–90. doi:10.1016/0014-4835(73)90212-1. PMID4198985.
Fleming, David G.; Hall, James L. (1959). "Autonomic Innervation of the Ciliary Body: A Modified Theory of Accommodation". American Journal of Ophthalmology. 48 (3): 287–93. doi:10.1016/0002-9394(59)90269-7. PMID13823443.