Hyperlinks and Pop-ups

How is this done?
Example article from Science Direct on Thesis Writing

In the HTML version, They have a little pop-up with the reference info when you hover over the citation.
In the PDF version, there's a hyperlink to the right bit of the Bibliography.

Can anyone think of a hack (or solution!) which would allow Zotero to do this?
  • not easily in the pdf version. A greasemonkey script on a per site basis may be feasable for some publishers pages

This is an old discussion that has not been active in a long time. Instead of commenting here, you should start a new discussion. If you think the content of this discussion is still relevant, you can link to it from your new discussion.