CrespiL.P. (1942). Quantitative variation in incentive and performance in the white rat.American Journal of Psychology, 40, 467-517.
2.
MacphailE.M. (1996). Cognitive function in mammals: The evolutionary perspective.Cognitive Brain Research, 3, 279-290.
3.
McLeanA.P., & WhiteK.G. (1983). Temporal constraint on choice: Sensitivity and bias in multiple schedules.Journal of Experimental Analysis of Behavior, 39, 405-426.
4.
WilliamsB.A. (1997). Varieties of contrast: A review of Incentive Relativity by Charles F. Flaherty.Journal of the Experimental Analysis of Behaviour, 68, 133-141.