How to automatically include back-references from references to citations

Question

In this publication at the references for each citation there is a link to the document where the reference came from. I found it very useful. How this can be done in an automatic way?

Answer 1

If you use Biblatex:

\usepackage[..., backref=true]{biblatex}

Answer 2

\usepackage[...,backref]{hyperref}