1. Inhibition of threshold excitation in the human eye;Beitel;J. gen. Psychol.,1936
2. History and present status of quantum theory in vision;Bouman,1959
3. Energy quanta and vision;Hecht;J. gen. Physiol.,1942
4. Visual perception and neurophysiology;Jung,1973
5. Low-luminance spatial and temporal interactions using orientation thresholds for two spot stimuli;Kortela,1975