Levin, M. E., Weaver, M. T., Palmatier, M. I., Caggiula, A. R., Sved, A. F., & Donny, E. C. (2012). Varenicline Dose Dependently Enhances Responding for Nonpharmacological Reinforcers and Attenuates the Reinforcement-Enhancing Effects of Nicotine. Oxford University Press.

Levin, Melissa E., Matthew T. Weaver, Matthew I. Palmatier, Anthony R. Caggiula, Alan F. Sved, and Eric C. Donny. Varenicline Dose Dependently Enhances Responding for Nonpharmacological Reinforcers and Attenuates the Reinforcement-Enhancing Effects of Nicotine. Oxford University Press, 2012.

Levin, Melissa E., et al. Varenicline Dose Dependently Enhances Responding for Nonpharmacological Reinforcers and Attenuates the Reinforcement-Enhancing Effects of Nicotine. Oxford University Press, 2012.