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Fox K, Sato H, Daw N (1990)
                
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The effect of varying stimulus intensity on NMDA-receptor activity in cat visual cortex.
                
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J Neurophysiol
                
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http://jn.physiology.org/cgi/content/abstract/64/5/1413?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&searchid=1&FIRSTINDEX=0&volume=64&firstpage=1413&resourcetype=HWCIT
                
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