Just Read
Volkow, Nora D., and Roy A. Wise. 2005. “How can drug addiction help us understand obesity?” Nature neuroscience 8 (5): 555–60. doi:10.1038/nn1452.
Montague, P. R., P. Dayan, and T. J. Sejnowski. 1996. “A framework for mesencephalic dopamine systems based on predictive Hebbian learning.” The Journal of neuroscience 16 (5): 1936–47.

