Benjamin P Kowal

Delay of smoking gratification as a laboratory model of relapse: effects of incentives for not smoking, and relationship with measures of executive function

Warren K Bickel, Reid D Landes, Richard Yi, 2009, Behavioural pharmacology.

Cigarette smokers discount past and future rewards symmetrically and more than controls: is discounting a measure of impulsivity?

Warren K Bickel, Richard Yi, W. Bickel, 2008, Drug and alcohol dependence.