HSL Bibliography
"Interdisciplinary perspectives on causation",
Visual causality, vol. 4: G. Grabhoff, T. Lampet & T. Sauer, pp. 119-139, 2001.
"Time-to-passage judgments on circular trajectories are based on relative optical acceleration",
Perception and Psychophysics, vol. 63, pp. 1153-1170, 2001.