I'm reading Chapter 8 of Modern Supersymmetry.
To understand the first sentence, I had to review Maldacena's paper, which (not-so) incidentally proposed the AdS/CFT correspondence (hence its numerous citations).
Hmmm. I'll have to read it again. ;-) But moving on ...
Okay, now need to review non-renormalization theorems and Wilsonian effective action.
Wow, lots to catchup!