Waterfall (M. C. Escher) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Waterfall (M. C. Escher)" in English language version.

refsWebsite

Global rank English rank

2^nd place

2^nd place

4^th place

4^th place

451^st place

277^th place

ams.org (Global: 451^st place; English: 277^th place)

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

doi.org (Global: 2^nd place; English: 2^nd place)

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 (Global: 4^th place; English: 4^th place)

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.