Ethereum version of Proof of Stake will be like Frankenstein's PoS monster,
not really worth your time , unless you wanted bloated confused code running a Bastardization of proof of stake.
How do you come to the conclusion?
OP was asking for sources to understand PoS. And the ethereum wiki is one of the best places where PoS is explained pretty detailed.
Calling it 'not worth the time' is just overstated.
Study Peercoin design as it is a hybrid of both PoW & PoS created by Sunny King.
OP was asking for PoS, not for any shitcoin utilizing a PoW/PoS hybrid.
Yo Dum Dum,
Sunny King invented Proof of Stake and used it in peercoin.
It is the original , so it is the one that should be studied first.
All the others derive from his original work and originally he combined PoW & PoS.
Eth is going to do some weird crap using their smart contract design to fake Proof of stake , it will not be like the true proof of stake design created by Sunny King ,
but something else. Which unless you are wanting to follow ethereum folly of smart contracts that are
NOT recognized in any court system in the world then you ignore his coin's bullshit as it is over bloated wasteful code and will eventually be crushed under it's own weight.
https://hackernoon.com/the-ethereum-blockchain-size-has-exceeded-1tb-and-yes-its-an-issue-2b650b5f4f62Because of Ethereum’s exponentially growing blocksize, the bottleneck is not regulated below these external factors and as such results in a shrinking and more centralized network due to network demands that increasingly exceed the average users hardware and bandwidth.
FYI:
Ethereum biggest weakness is it's blockchain is growing exponentially.
Bitcoin biggest weakness is its energy requirements are growing exponentially.
Both Major issues totally ignored by their communities.