1. ADMIRAAL, D. J. H. & M. A. ALEWIJNSE. An Infrared Pupillometer based on the Television Scanning Technique.IPO Annual Progress Report 1,126–134 (1966).
2. BARTLEY, S. H.. A Factor in Visual Fatigue.Psychosom. Med. 4,369–375 (1942).
3. BLEICHERT, A. & R. WAGNER. Über den Frequenzgang der Pupillenreaktion auf Licht.Z. Biol. 109,281–296 (1957b).
4. BOUMA, H. Receptive Systems. Mediating Certain Light Reactions of the Pupil of the Human Eye. Dissertation Eindhoven 1965 (oderPhilips Research Reports 1965, suppl. 5).
5. CAMPBELL, F. W. & J. G. ROBSON. The Attenuation Characteristics of the Visual System Determined by Measurements of Flicker Threshold, Brightness and Pupillomotor Effect of Modulated Light.Doc. ophthal. 18,83–84 (1964).