https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=47106 (Publisher version)
Little, J., Bülthoff, H., & Poggio, T. (1989). A Parallel Motion Algorithm Consistent with Psychophysics and Physiology. In Workshop on Visual Motion 1989 (pp. 165-172). Washington, DC, USA: IEEE Computer Society Press.