Try this one:
Cohen J.D., Braver T.S. & Brown J.W. (2002) Computational perspectives
on dopamine function in prefrontal cortex. Current Op. in Neurobiology
12:223-229
It doesn't focus on dopamine (DA) and learning but gives a very short
general overview about dopamine function. The references include some
standard publications concerning DA & learning.
Regards,
Thomas
