Andrus, Jerry, "Explanation of the Impossible Box and the Plank Illusion," Skeptical Inquirer, Spring, 1994, pp. 316-317
 
 

Anno, Mitsmasa, Strange Pictures, Tokyo: Fukuikan Shoten, 1968
 
 

Anno, Mitsmasa, The Unique World of Mitsumasa Anno: Selected Illustrations 1969-1977, Tokyo: Kodansha Ltd., 1977
 
 

Anon, Problems of Perceptions of Problems of Perception...: New Perspectives with Stemetil, Medical catalogue, England: May and Baker, [no date]
 
 

Baldwin, H., "Building Better Blivits," Worm Runners' Digest, 9, 1967, pp. 104-106
 
 

Block, J. R. and Harold Yuker, Can You Believe Your Eyes?, New York: Gardner Press, 1989
 
 

Brisson, D. W., ed., Hypergraphics - Visualizing Complex Relationships in Art, Science and Technology, Boulder: Westview Press, 1978, pp. 177-185
 
 

Cochran, C. F., "Letter to Scientific American," Scientific American, 1966, vol. 214, p. 8
 
 

Cole, K. C., Vision: In the Eye of the Beholder, San Francisco: Exploritorium, 1978
 
 

Cowan, Thaddeus and R. Pringle, "An Investigation of the Cues Responsible for Figure Impossibility," Journal of Experimental Psychology; Human Perception and Performance, vol. 4, no. 1, 1978, pp. 112-120
 
 

Cowen, Thaddeus, "Organizing the Properties of Impossible Figures," Perception, vol. 6., no. 1, 1977, pp. 41-56
 
 

Cowan, Thaddeus, "The Theory of Braids and the Analysis of Impossible Figures," Journal of Mathematical Psychology, vol 11, 3, 1974, pp. 190-212
 
 

Cowen, Thaddeus, "Supplementary Report: Braids, Side Segments, and Impossible Figures," Journal of Mathematical Psychology, vol. 16, 1977, pp. 254-260
 
 

Coxeter, H. S. M. et al. eds., M. C. Escher: Art and Science, Amsterdam, Elsevier, 1986
 
 

Cultural Project Department I, The Asahi Shimbun, Toyko, The Expanding Perceptual World - A Museum of Fun I [in Japanese and English], Japan: Toppan Printing Co., 1979
 
 

Cultural Project Department I, The Asahi Shimbun, Toyko, The Expanding Perceptual World - A Museum of Fun  II [in Japanese and English], Japan: Toppan Printing Co., 1984
 
 

Del-Prete, Sandro, Illusoria, Bern: Benteli, 1987
 
 

Del-Prete, Sandro, Illusorismen, Illusorismes, Illusorisms, Bern: Benteli, 1984
 
 

De Mey, Jos, Exhibition Catalogue, Belgium, 1994
 
 

Draper, Stephen, "The Penrose Triangle and a Family of Related Figures," Perception, vol. 7, 1978, pp. 283-296
 
 

Draper, S. W., "The Use of Gradient and Dual Space in Line Drawing Interpretation," Artificial Intelligence, vol. 17, no. 1, 1981, pp. 461-508
 
 

Ernst, Bruno, Adventures with Impossible Figures, Norfolk: Tarquin Publications, 1986
 
 

Ernst, Bruno, The Eye Bequiled: Optical Illusions, Germany: Benedikt Taschen, 1992
 
 

Ernst, Bruno, The Magic Mirror of M. C. Escher, Norfolk: Tarquin Publications, 1985
 
 

Ernst, Bruno, Nieuwe Advonturen met On-mogelijke Figuren, Den Haag: Koninklijke-Bibliotheek, 1990
 
 

Escher, M. C., Escher on Escher: Exploring the Infinite, New York: Harry Abrams, Inc., 1989
 
 

Falk, G., "Interpretation of Imperfect Line-data as a 3-D Scene," Artificial Intelligence, vol 3, no 2, 1972, pp. 101-144
 
 

Falletta, Nicholas, The Paradoxicon, New York, John Wiley & Sons, 1983
 
 

Farkas, Tamas, The Paintings of Tamas Farkas, exhibition catalogue, Budapest, 1989
 
 

Fineman, Mark, The Inquisitive Eye, Oxford: Oxford University, 1981
 
 

Frisby, John,  Seeing: Illusion, Brain and Mind,  Oxford: Oxford University Press,  1980
 
 

Fukuda, Shigeo, The Trick [in Japanese], catalogue exhibition, Japan, April 1989
 
 

Fukuda, Shigeo, Visual Illusion [in Japanese and English], Japan: Rikuyosha Publishing, 1982
 
 

Gardner, Martin, "Of Optical Illusions from Figures that are Undecidable to Hot Dogs that Float," Scientific American, November 1968, pp. 48-58
 
 

Gibilisco, Stan, Optical Illusions: Puzzles, Paradoxes and Brain Teasers #4, PA: Tab Books, 1990
 
 

Gombrich, E.H., The Sense of Order: A Study in the Psychology of Decorative Art, Cornell University Press, New York, 1984
 
 

Gregory, Richard and John Harris, et al., The Artful Eye, Oxford: Oxford University Press, 1995
 
 

Richard Gregory and E. H. Gombrich, eds., Illusion in Nature and Art, London: Duckworth, 1973, pp. 49-95
 
 

Gregory, Richard, The Intelligent Eye, London, Weidenfeld and Nicholson, 1970
 
 

Gregory, Richard, "Visual Illusions," Scientific American, November 1968, pp. 48-58
 
 

Harris, W. F., "Perceptual Singularities in Impossible Pictures Represent Screw Dislocations," South African Journal of Science, vol. 69, 1973, pp. 10-13
 
 

Hayward, R., "Blivits: Research and Development," Worm Runners' Digest, 10, 1968, pp. 89-92
 
 

Hofstadter, Douglas, Godel, Escher, Bach: An Eternal Golden Braid, New York: Vintage Books, 1980
 
 

Huffman, D. A., "Impossible Objects as Nonsense Sentences," in B. Melzer and D. Michie, eds., Machine Intelligence 6, Edinburgh University Press, 1971, pp. 295-323
 
 

Hughes, Patrick and George Brecht, Vicious Circles and Infinity: A Panoply of Paradoxes, London: Jonathan Cape, 1975
 
 

Hyzer, W. G., "Plenty of Chances to goAstry in Photographic Interpretation," Photo Methods for Industry, January 1970, pp. 20-24
 
 

Istvan, Orosz, OYTIS, exhibition catalogue, Budapest: Balassi Kiado, 1994
 
 

Kanade, T., "Recovery of the Three-dimensional Shape of an Object from a Single View," Artifical Intelligence, vol. 17, no. 1, 1981, pp. 409-460
 
 

Kanade, T., "A Theory of the Orgami World," Artificial Intelligence, vol. 13, 1980. pp. 279-311
 
 

Kulpa, Zenon, "Are Impossible Figures Possible?," Signal Processing, vol. 5, no. 3, 1983, pp. 201-220
 
 

Kulpa, Zenon, Challenge to Geometry - Oscar Reutersvard, Zenon Kulpa - Impossible Figures, Lodz: Art Museum of Lodz, exhibition catalogue, 1984
 
 

Kulpa, Zenon, Oscar Reutersvard [in Russian and English], Moscow: Contemporary Art Center, Architectural Gallery, exhibition catalogue, 1993
 
 

Kulpa, Zenon, "Oscar Reutersvard's Exploration of Impossible Lands," in 150 Omojliga figurer - Oscar Reutersvard, Malmo: Malmo Museum, exhibition catalogue, 1981
 
 

Kulpa, Zenon, "Putting Order in the Impossible," in E. Terouanne, ed., Proceedings of the 16th Meeting of the European Mathematical Psychology Group: Montpellier, September 1985, Montpellier, 1985, pp. 127-144
 
 

Kulpa, Zenon, Zenon Kulpa: Figury Niemozliwe Lekcja Widzenia Przestrzeni [in Polish], exhibition catalogue, Warsaw, Galeria PSEP, May 1986
 
 

Letters to the editor, Mad Magazine, volume 95, June 1965
 
 

Locher, J. L., ed., M. C. Escher: His Life and Complete Graphic Work, New York: Harry N. Adams, 1982
 
 

Paulsen, Hermann, Unmogliche Figuren, Germany: H. Paulsen, [no date]
 
 

Penrose, Lionel and Roger Penrose, "Impossible objects: A Special Type of Visual Illusion," British Journal of Psychology, vol. 49, 1958, pp. 31-33
 
 

Petry, Susan and Glenn Meyer, eds., The Perception of Illusory Contours, New York: Springer-Verlag, 1987
 
 

Rainey, Patricia Ann, Illusions: A Journey into Perception, Connecticut, Shoe String Press, 1973
 
 

Reutersvard, Oscar, Onmogelijke Figuren, Amsterdam: Meulenhoff, 1983
 
 

Reutersvard, Oscar, Impossible Figures [In Russian], Moscow: 1990
 
 

Reutersvard, Oscar, Onmogelijke Figuren in Kleur, Amsterdam: Meulenhoff, [no date]
 
 

Reutersvard, Oscar, Omojliga Figurer i Farg, Bodafors: Bokforlaget Doxa AB, 1982
 
 

Robinson, J. O. and J. A. Wilson, "The Impossible Colonnade and other Variations of a Well-known Figure," British Journal of  Psychology, vol. 64, no. 3, 1973, pp. 363-365
 
 

Robinson, J. O., The Psychology of Visual Illusions, London: Hutchinson University Library, 1972
 
 

Schuster, D.H., "A New Ambiguous Figure: a Three-stick Clevis,"American Journal of Psychology, vol. 77, 1964, p. 673
 
 

Shapira, R. and H. Freeman, "A Cyclic-order Property of Bodies with Three-face Vertices," IEEEE Transactions on Computers, vol. C-26, no. 10, 1977, pp. 1035-1039
 
 

Shepard, Roger, Mind Sights: Original Visual Illusions, Ambiguities, and other Anomalies, New York: W. H. Freeman and Company, 1990
 
 

Singmaster, David, "Don't Believe Your Eyes!," in Focus, December 1994, pp. 18-21
 
 

Sugihara, Kokichi, "Classification of Impossible Objects," Perception, vol. 11, 1982, pp. 65-74
 
 

Sugihara, Kokichi, "Dictionary-guided Scene Analysis based on Depth Information," in Report on Pattern Information Processing Systems, No. 13, Tokyo: Electrotechnical Laboratory, 1977
 
 

Sugihara, Kokichi, "Picture Language for Skeletal polyhedra," Computer Graphics and Image Processing, vol. 8, 1978, pp. 382-405
 
 

Sugihara, Kokichi, "Studies on Mathematical Structures of Line Drawings of Polyhedra and their Applicatons to Scene Analysis," Tokyo: Researches of the. Electrotechnical Laboratory, no. 800, 1979
 
 

Teuber, Marianne, "Sources of Ambiguity in the Prints of Mauritis C. Escher," Scientific American, July, 1974, pp. 90-104
 
 

Terouanne, E., "Impossible Figures and Interpretations of Polyhedral Figures," Journal of Mathematical Psychology, vol. 27, 1983, pp. 370-405
 
 

Terouanne, E., "On a Class of 'Impossible' Figures: a New Language for a New analysis," Journal of Mathematical Psychology, vol. 22, no. 1, 1983, pp. 24-47
 
 

Thro, E. B., "Distinguishing Two classes of Impossible Objects," Perception, vol. 12, no. 6, 1983, pp. 733-751
 
 

Turner, Harry, Triad: Optical Illusions and How to Design Them, New York: Dover Publications, 1978
 
 

Whiteley, "Realizability of Polyhedra," in Structural Topology, vol.  1, Montreal: University of Montreal Press, 1979, pp. 46-58
 
 

Winston, P. H.,  ed., The Psychology of Computer Vision, New York: McGraw-Hill, 1975, pp. 19-91
 
 

Whiteley, "Realizability of Polyhedra," in Structural Topology, vol.  1, Montreal: University of Montreal Press, 1979, pp. 46-58
 
 

Young, A. W. and J. B. Deregowski, "Learning to See the Impossible," Perception, vol. 10, 1981, pp. 91-105