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APA Citation
Blumhardt, L. D., Barrett, G., & Halliday, A. M. (1977). the asymmetrical visual evoked potential to pattern reversal in one half field and its significance for the analysis of visual field defects.. British journal of ophthalmology, 61(7), 454–461. http://access.bl.uk/ark:/81055/vdc_100144701130.0x00004c