Wade, Nicholas (1996). "Descriptions of visual phenomena from Aristotle to Wheatstone". Perception. 25 (10): 1137–1175. doi:10.1068/p251137. PMID9027920. S2CID21480863.
Wade, Nicholas (1996). "Descriptions of visual phenomena from Aristotle to Wheatstone". Perception. 25 (10): 1137–1175. doi:10.1068/p251137. PMID9027920. S2CID21480863.
McLin, Leon N. Jr; Schor, Clifton M. (1988). "Voluntary effort as a stimulus to accommodation and vergence". Investigative Ophthalmology & Visual Science. 29 (11): 1739–1746. PMID3182206.
Wade, Nicholas (1996). "Descriptions of visual phenomena from Aristotle to Wheatstone". Perception. 25 (10): 1137–1175. doi:10.1068/p251137. PMID9027920. S2CID21480863.