http://dspace.mit.edu/handle/1721.1/6523 (Publisher version)
disparity_gradients_and_depth_scaling_760.pdf (Any fulltext), 9MB
Bülthoff, H., & Fahle, M.(1989). Disparity Gradients and Depth Scaling (A.I. Memo 1175). Cambridge, MA, USA: Massachusetts Institute of Technology Artificial Intelligence Laboratory and Center for Biological Information Processing Whitaker College.