KellerF. S.Light-aversion in the white rat. Psychol. Rec., 1941, 4, 235–250.
2.
KishG. B.Learning when the onset of illumination is used as the reinforcing stimulus, J. comp. physiol. Psychol., 1955, 48, 261–264.
3.
MarxM. H.HendersonR. L., & RobertsC. L.Positive reinforcement of the bar-pressing response by a light stimulus following dark operant pretests with no aftereffect. J. comp. physiol. Psychol., 1955, 48, 73–76.
4.
SteinL., & RayO. S.Self-regulation of brain-stimulating current intensity in the rat. Science, 1959, 130, 570–572.