Question about Video Poker

I am interested in expanding my AP horizons. I hear a lot about advantage opportunities in Video Poker. I know there are a very few 100.7% payout machines in Vegas. And I have run the analysis myself to verify that perfect play does in fact produce a 100.7% payout. But I think there is another opportunity that advantage players are exploiting. And that is progressive Video Poker. It seems a progressive video poker offers a positive EV when the progressive is high enough.

My question: Where can I learn more about this advantage opportunity? Any good books with payout schedules and EVs? I could do this work myself, but it is always easier to review someone else's work. Thanks.