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Maniatis, Lydia M. (2008-11-01). "The Leaning Tower Illusion is Not a Simple Perspective Illusion". Perception. 37 (11): 1769–1772. doi:10.1068/p6102. ISSN0301-0066. PMID19189738.
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Maniatis, Lydia M. (2008-11-01). "The Leaning Tower Illusion is Not a Simple Perspective Illusion". Perception. 37 (11): 1769–1772. doi:10.1068/p6102. ISSN0301-0066. PMID19189738.