"Mendeley is a free reference manager and academic social network. Make your own fully-searchable library in seconds, cite as you write, and read and annotate your PDFs on any device".
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Mendeley Introduction for Researchers (46 min)
This introductory video starts with the basics and then moves to more advanced uses of Mendeley.
Follow the link below to download the latest version of Mendeley for Windows, Linux, or Mac.