Thanks for link. I think comments do add value, especially for the author looking for feedback, moreso than perhaps the reader. Soundcloud has time-based comme

Thanks for link. I think comments do add value, especially for the author looking for feedback, moreso than perhaps the reader. Soundcloud has time-based comments on tracks and also general comments. Both are important. Amazon's book reviews also work well. Another important aspect of research is references/bibliography and it would be great to have an in-text access to a reference. eg a popup that can reveal the exact quote or piece of text that a paper is referring to. Doing reference cross-checks is something that can be very tedious but could be great at locating additional and interesting material for the reader. Surely this use-case has been addressed in current journal UX..