Obxecto imposíbel (Galician Wikipedia)

Analysis of information sources in references of the Wikipedia article "Obxecto imposíbel" in Galician language version.

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anopticalillusion.com

"Impossible Elephant" (en inglés). 9 de marzo de 2012. Consultado o 12-05-2021. ..one of the most famous and classic optical illusions of all time. While most people know it simply as the "impossible elephant," the actual title of the work is "L’egs-istential Quandary." |first1= sen |last1= in Authors list (Axuda)

archive.org

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

books.google.com

Barrow, John D (1999). Impossibility: The Limits of Science and the Science of Limits. ISBN 9780195130829.

doi.org

dx.doi.org

"Impossible objects: A special type of optical illusion". British Journal of Psychology 49: 31–33. 1958. PMID 13536303. doi:10.1111/j.2044-8295.1958.tb00634.x. |first1= sen |last1= in Authors list (Axuda)

fink.com

"Impossible Figures in Perceptual Psychology".

google.com.br

books.google.com.br

Barrow, John D. (1999). Impossibility: The Limits of Science and the Science of Limits (en inglés).

nih.gov

ncbi.nlm.nih.gov

"Impossible objects: A special type of optical illusion". British Journal of Psychology 49: 31–33. 1958. PMID 13536303. doi:10.1111/j.2044-8295.1958.tb00634.x. |first1= sen |last1= in Authors list (Axuda)

web.archive.org

Khoh, Chih W.; Kovesi, Peter (fevereiro de 1999). "Animating Impossible Objects".

wolfram.com

mathworld.wolfram.com

"Impossible Fork".