5Kirby, K. N. , N. M. Petry, et al. Heroin addicts have higher discount rates for delayed rewards than non - drug - using controls. Journal of Experimental Psychology: General 1999,128 ( 1 ) : 78.
6Coffey, S. F. , G. D. Gudleski, et al. Impulsivity and rapid discounting of delayed hypothetical rewards in cocaine -dependent individuals. " Experimental and Clinical Psychopharmacology 2003,11 (1) : 18.
7Reynolds, B. , J. B. Riehards, et al. Delay discounting and probability discounting as related to cigarette smoking status in adults. Behavioural Processes. 2004,65( 1 ) : 35 -42.
8Alessi, S. M. and N. M. Petty. Pathological gambling severity is associated with impulsivity in a delay dis- counting procedure. " Behavioural Processes . 2003,64 (3) : 345 - 354.
9Madden, G. J. , N. M. Petry, et al. Impulsive and self - control choices in opioid - dependent patients and non - drag - using control patients: Drug and monetary rewards. Experimental and Clinical Psychopharmaeology. 1997,5(3) : 256.
10Cardinal, R. N. , C. A. Winstanley, et al. Limbic corticostriatal systems and delayed reinforcement. An- nals of the New York Academy of Sciences. 2004,1021 ( 1 ) : 33 -50.