Impossible object (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Impossible object" in English language version.

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

Phillips, Tony. "The Topology of Impossible Spaces". American Mathematical Society.

archive.org (Global: 6^th place; English: 6^th place)

Seckel, Al (2004). Masters of Deception: Escher, Dalí & the Artists of Optical Illusion. Sterling Publishing Company. p. 261. ISBN 1402705778.

books.google.com (Global: 3^rd place; English: 3^rd place)

Barrow, John D (1999). Impossibility: The Limits of Science and the Science of Limits. Oxford University Press. p. 14. ISBN 9780195130829.

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

Aigner, Martin; Ziegler, Günter M. (2018). "Chapter 15: The Borromean Rings Don't Exist". Proofs from THE BOOK (6th ed.). Springer. pp. 99–106. doi:10.1007/978-3-662-57265-8_15. ISBN 978-3-662-57265-8.
Penrose, LS; Penrose, R. (1958). "Impossible objects: A special type of optical illusion". British Journal of Psychology. 49 (1): 31–33. doi:10.1111/j.2044-8295.1958.tb00634.x. PMID 13536303.
Penrose, Roger (1992). "On the Cohomology of Impossible Figures". Leonardo. 25 (3, 4). The MIT Press: 245–247. doi:10.2307/1575844. JSTOR 1575844. S2CID 125905129.

fink.com (Global: low place; English: low place)

"Impossible Figures in Perceptual Psychology". Fink.com. Retrieved 11 February 2014.

jstor.org (Global: 26^th place; English: 20^th place)

Penrose, Roger (1992). "On the Cohomology of Impossible Figures". Leonardo. 25 (3, 4). The MIT Press: 245–247. doi:10.2307/1575844. JSTOR 1575844. S2CID 125905129.

nih.gov (Global: 4^th place; English: 4^th place)

pubmed.ncbi.nlm.nih.gov

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

semanticscholar.org (Global: 11^th place; English: 8^th place)

api.semanticscholar.org

Penrose, Roger (1992). "On the Cohomology of Impossible Figures". Leonardo. 25 (3, 4). The MIT Press: 245–247. doi:10.2307/1575844. JSTOR 1575844. S2CID 125905129.

uwa.edu.au (Global: 7,226^th place; English: 4,917^th place)

csse.uwa.edu.au

Khoh, Chih W.; Kovesi, Peter (February 1999). "Animating Impossible Objects". Archived from the original on 28 May 2015. Retrieved 10 February 2014.

web.archive.org (Global: 1^st place; English: 1^st place)

Khoh, Chih W.; Kovesi, Peter (February 1999). "Animating Impossible Objects". Archived from the original on 28 May 2015. Retrieved 10 February 2014.

wolfram.com (Global: 513^th place; English: 537^th place)

mathworld.wolfram.com

"Impossible Fork". Wolfram Research. Retrieved 10 February 2014.