Seconding Penrose. Depending on how broadly you want to cast your net, you could include a sampling of the anti-AI philosophy of mind literature, including Searle, maybe Ned Block, etc. They may not explicitly argue that AIs would keep humans around because we have some mental properties they lack, but you could use those folks' writings as the basis for such an argument.

In fact, I would be personally opposed to activating an allegedly friendly superintelligence if I thought it might forcibly upload everybody, due to uncertainty about whether consciousness would be preserved. I'm not confident that uploads wouldn't be conscious, but neither am I confident that they would be conscious.

Unfortunately, given the orthogonality thesis (why am I not finding the paper on that right now?), this does nothing for my confidence that an AI would not try to forcibly upload or simply exterminate humanity.