en Campbell, Donald T. (noiembrie 1960). „Blind variation and selective retention in creative thoughts as in other knowledge processes”. Psychological Review. 67 (6): 380–400. doi:10.1037/h0040373. PMID13690223.
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en Campbell, Donald T. (noiembrie 1960). „Blind variation and selective retention in creative thoughts as in other knowledge processes”. Psychological Review. 67 (6): 380–400. doi:10.1037/h0040373. PMID13690223.