1. E. Rubin. Visuell wahrgenommene figuren (Glydendalske, Copenhagen, 1915): E. Rubin. Fig ure and ground, in Readings in Perception. D. C. Beardslee and M. Wertheimer, Eds (Van Nostrand, New York, 1958).
2. Subjective contours and apparent depth: A direct test
3. I Rock. An Introduction to Perception (MIT Press, Cambridge, MA, 1975): V. Klymenko and N. Weisstein, Spatial frequency difference can determine figure-ground organisation, Journal of Experimental Psychology Human Perception and Performance, 12, 324-330 (1986).
4. M.I. Posner, Chronometric Explorations of Mind (Erlbaum, Hillsdaie, NJ. 1978).
5. M. K. Albert and D. D. Hoffman. Generic visions, Scientific American (in press); see also I. Rock. The Logic of Perception (MIT Press, Cambridge, MA, 1983).