Barclay, C. B.,Cutting, J. E.,Kozlowski, L. T.(1978).Temporal and spatial factors in gait perception that influence gender recognition.Perception & Psychophysics.23,145-152.
Cutting, J. E.,Proffitt, D. R.,Kozlowski, L. T.(1978).A biomechanical invariant for gait perception.Journal of Experimental Psychology: Human Perception and Performance.4(3),357-372.