Review of modern terrain rendering/LOD methods?

I'm just looking for a good review of modern large-scale terrain rendering techniques. I've been reading about a few individually, various quadtree stuff, GPU clipmaps, continuous methods, but I don't have a good grasp of the state of the art, performance comparisons between methods, what I should invest my time learning better etc. A well-written review article would help a lot. But I can't find much, at least not from the last few years. If there isn't a good academic article maybe someone wrote a great blog post or something? I get a lot of hits searching around but they are mostly zillions of different people implementing this or that algorithm for demo projects, it's harder to find systematically put together information giving an overview of the field and techniques.