What are the best, less well-known blockchain white papers?

I know Ethereum and Bitcoin are the prime examples of the white papers for blockchain. What are less known high quality white papers that you have come across?

Asking because I often see mentions of blockchain / ICOs followed up by accusations of scam based on the quality of the white-paper, so really curious to see the ones that have better white papers. Thank you

Good white papers, like Satoshi Nakamoto's original, focus on technology, not on teams, partnerships, roadmaps, and marketing.

Here's a great example:

http://mimblewimble.cash/20160719-OriginalWhitePaper.txt

FunFair: https://funfair.io/explore/whitepapers/