1. Effect of light: dark ratio on the fusion frequency of flicker;Winchell;J. Applied Physiol.,1951
2. Measurements of fusion frequency of flicker as a test of fatigue of the central nervous system; observations on laboratory technicians and office workers;Simonson;J. Indust. Hyg. & Toxicol.,1941
3. Effect of amphetamine (benzedrine) on fatigue of the central nervous system;Simonson;War Med.,1941
4. Effect of pervitin (desoxyephedrine) on fatigue of the central nervous system;Simonson;J. Indust. Hyg. & Toxicol.,1942
5. Ueber die Messung der psychischen Ermüdung mit Hilfe des Flimmer-tests;Schmidtke;Psycholog. Forsch.,1951