Glucksberg, S. (1962). "The influence of strength of drive on functional fixedness and perceptual recognition". Journal of Experimental Psychology. 63: 36–41. doi:10.1037/h0044683. PMID13899303.
Glucksberg, S. (1962). "The influence of strength of drive on functional fixedness and perceptual recognition". Journal of Experimental Psychology. 63: 36–41. doi:10.1037/h0044683. PMID13899303.