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Binder, J. R.; Westbury, C. F.; McKiernan, K. A.; Possing, E. T.; Medler, D. A. (1 June 2005). "Distinct Brain Systems for Processing Concrete and Abstract Concepts". Journal of Cognitive Neuroscience. 17 (6): 905–917. doi:10.1162/0898929054021102. PMID16021798. S2CID207624180.
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Binder, J. R.; Westbury, C. F.; McKiernan, K. A.; Possing, E. T.; Medler, D. A. (1 June 2005). "Distinct Brain Systems for Processing Concrete and Abstract Concepts". Journal of Cognitive Neuroscience. 17 (6): 905–917. doi:10.1162/0898929054021102. PMID16021798. S2CID207624180.
Binder, J. R.; Westbury, C. F.; McKiernan, K. A.; Possing, E. T.; Medler, D. A. (1 June 2005). "Distinct Brain Systems for Processing Concrete and Abstract Concepts". Journal of Cognitive Neuroscience. 17 (6): 905–917. doi:10.1162/0898929054021102. PMID16021798. S2CID207624180.
Binder, J. R.; Westbury, C. F.; McKiernan, K. A.; Possing, E. T.; Medler, D. A. (1 June 2005). "Distinct Brain Systems for Processing Concrete and Abstract Concepts". Journal of Cognitive Neuroscience. 17 (6): 905–917. doi:10.1162/0898929054021102. PMID16021798. S2CID207624180.
Binder, J. R.; Westbury, C. F.; McKiernan, K. A.; Possing, E. T.; Medler, D. A. (1 June 2005). "Distinct Brain Systems for Processing Concrete and Abstract Concepts". Journal of Cognitive Neuroscience. 17 (6): 905–917. doi:10.1162/0898929054021102. PMID16021798. S2CID207624180.
Rouder, Jeffrey; Ratcliff, Roger (2006). "Comparing Exemplar and Rule-Based Theories of Categorization". Current Directions in Psychological Science. 15: 9–13. doi:10.1111/j.0963-7214.2006.00397.x. S2CID7290181.