1. Da Vinci, L. Trattato Della Pittura Di Leonardo Da Vinci (Langlois, Paris, 1651).
2. Cutting, J. E. & Vishton, P. M. Perceiving layout and knowing distances: The integration, relative potency, and contextual use of different information about depth. In Epstein, W. & Rogers, S. J. (eds) Handbook of Perception and Cognition, Vol 5: Perception of Space and Motion, 69–117 (Academic Press, San Diego, CA, 1995).
3. Proffitt, D. R. & Caudek, C. Depth perception and the perception of events. In Healy, A. F. & Proctor, R. W. (eds) Handbook of Psychology, Vol. 4: Experimental Psychology, 213–236 (Wiley, New York, 2002).
4. Loomis, J. M. & Knapp, J. M. Visual perception of egocentric distance in real and virtual environments. Virtual and Adaptive Environments 11, 21–46 (2003).
5. Loomis, J. & Philbeck, J. W. Measuring perception with spatial updating and action. In Klatzky, R. L., MacWhinney, B. & Behrman, M. (eds) Embodiment, Ego-space, and Action, 1–43 (Psychology Press, New York, 2008).