滝 (エッシャー) (Japanese Wikipedia)

Analysis of information sources in references of the Wikipedia article "滝 (エッシャー)" in Japanese language version.

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ams.org

Schattschneider, Doris (2010). “The Mathematical Side of M. C. Escher”. Notices of the AMS (American Mathematical Society) 57 (6): 706–718.

doi.org

Penrose, L. S.; Penrose, R. (1958). “Impossible objects: A special type of visual illusion”. British Journal of Psychology 49 (1): 31–33. doi:10.1111/j.2044-8295.1958.tb00634.x. PMID 13536303.

nih.gov

pubmed.ncbi.nlm.nih.gov

Penrose, L. S.; Penrose, R. (1958). “Impossible objects: A special type of visual illusion”. British Journal of Psychology 49 (1): 31–33. doi:10.1111/j.2044-8295.1958.tb00634.x. PMID 13536303.