Zotero citation management: Groups (sharing citations)
Zotero is a free citation manager. This page offers information that will help you create and build a Zotero library, create and use groups to collaborate, and use Zotero to add properly formatted citations to your papers.
Private: create for specific individuals (ideal for small groups). If you plan to share files (e.g. article PDFs), the group MUST be private when created (not after the fact).
Public: Anyone may create a public group, and you may search for existing public groups (specific interest). NOTE: Public groups ONLY allow sharing of citations, not files (e.g. PDFs).