Êàìåðîí Áðàóí. Íåâîçìîæíûå ôðàêòàëû

1. Gardner, M. Optical Illusions, Mathematical Circus, 1968, Alfred A. Knopf, New York, 3-15.
2. Penrose, L. and Penrose, R. Impossible Objects: A Special Type of Visual Illusion, British Journal of Psychology, 1958, 49:1, 31-33.
3. Ernst, B. The Eye Beguiled: Optical Illusions, Taschen, Berlin, 1986.
4. Peitgen, H., Jürgens, H. and Saupe, D. Chaos and Fractals: New Frontiers of Science, Springer, New York, 1992.
5. Weisstein, E. Peano-Gosper Curve, Mathworld, http://mathworld.wolfram.com/Peano-GosperCurve.html
6. Schuster, D. H. A New Ambiguous Figure: A Three-Stick Clevis, American Journal of Psychology, 77, 1964, 673.