The discontinuos functioning of the human operator in pursuit task, ”Quart. J. exp. Psychol.“, 1948, vol. 1, p. 36–57;
   The thereshold for sudden changes in the velocity of a seen object, ”Quart. J. exp. Psychol.“, 1950, vol. 2, p.33–41;
   On the of gain of information, ”Quart. J. exp. Psychol.“, 1952, vol. 4, p.11–26.