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29. The role of the response-reinforcer relation in delay-of-reinforcement effects. Williams AM, Lattal KA. J Exp Anal Behav; 1999 Mar; 71(2):187-94. PubMed ID: 10220929 [Abstract] [Full Text] [Related]
30. Interaction of methadone, reinforcement history, and variable-interval performance. Nader MA, Thompson T. J Exp Anal Behav; 1987 Sep; 48(2):303-15. PubMed ID: 3681187 [Abstract] [Full Text] [Related]
31. Effects of d-amphetamine on responding under second-order schedules of reinforcement with paired and nonpaired brief stimuli. Cohen SL. J Exp Anal Behav; 1991 Sep; 56(2):289-302. PubMed ID: 1955818 [Abstract] [Full Text] [Related]