Zotero is great if you really need to build your own literature database (with all the advantages & disadvantages of this route). I originally had Zotero attached to a Wordpress/bbPress forum, but have moved away from that approach and am using this instead:
For a use case where you basically just want to assist users in providing correct litterature references, I find this a much more practical approach. Check out the demo video below, I would LOVE to see this kind of functionality available on Discourse. It would really help to open it up for academic scenarios.