Im just gonna ask here just to be safe: is there any reason at all that the trope namer, Barbra Streissand's appearance on South Park, isn't named here?

Apparently there's some sort of silly edit war going on in this page. When that's over with, someone please add The Satanic Verses to Literature. It was selling a few hundred copies a week until the fatwa against Rushdie. Afterwards, it became so popular that it sold five times more copies than the #2 best-seller. It's still the publisher's best-selling book of all time.

"Psychologists have done studies and found that the subjects' desire for any kind of potentially censorable material increased when the subjects were told that it was censored. The old Forbidden Fruit principle in action, in other words."

Does anyone know exactly where these studies were published? I want to use them for an academic source.