Despite the article being four years old—I'd like to think I've come a way in terms of better referencing reliable sources since then—there is evidence in the reference cited that speaks directly to the claim, but you would have to stretch yourself to uncover it. Or you could just Google it I guess.
e.g. the claim from the article: "Your [pre]frontal cortex happens to be a major dopamine hub...it's the hub for processing dopamine" is formed from the association of dopamine's function within the frontal lobe; namely, and from the source, how depletion of it has been identified as a major hinderance to abilities stemming from that area of the brain.
Of course the all-reliable (/s) Wikipedia also tells us: "The frontal lobe contains most of the dopamine-sensitive neurons in the cerebral cortex." Dopamine certainly plays a major part in that region of the brain, again a Google search yields enough on the subject to warrant a statement of the variety I originally made.