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Ullman, M.T. (2004) Contributions of memory circuits to language: the declarative/procedural model. Cognition. 92. pp. 231–270. "Archived copy"(PDF). Archived from the original(PDF) on July 19, 2011. Retrieved April 2, 2011.{{cite web}}: CS1 maint: archived copy as title (link)
Ullman, M. T., Corkin, S., Coppola, M., Hickok, G., Growdon, J. H., Koroshetz, W. J. Pinker, S. (1997). The Journal of Cognitive Neuroscience, Vol 9, 266–276 [1]Archived November 20, 2008, at archive.today
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Ullman, M.T. (2004) Contributions of memory circuits to language: the declarative/procedural model. Cognition. 92. pp. 231–270. "Archived copy"(PDF). Archived from the original(PDF) on July 19, 2011. Retrieved April 2, 2011.{{cite web}}: CS1 maint: archived copy as title (link)