Hamad Bin Khalifa University
Instead of exporting references one-by-one and adding them to the bib file in your LaTeX editor, it is highly recommended to organize all references in Mendeley and then export them all as one BibTeX file.
Reference Manager Synchronization is a premium feature in Overleaf available to HBKU members.
"Once Mendeley is linked to your Overleaf account you can import references contained in your Mendeley library and keep those imported references synched with your Mendeley account. If you update reference data in Mendeley you can instruct Overleaf to update (Refresh) the references it has imported—the short videos below show how to refresh references imported from Mendeley (and Zotero)." (Overleaf Website)



You can keep the references in your overleaf project synched with your Mendeley account. If you update reference data in Mendeley, Refresh Overleaf to update the references imported.
Mendeley import and synching feature brings in your entire Mendeley library; however, you can import, and sync, a specific group contained within your Mendeley account. So far, Overleaf does not yet support importing Mendeley folders.
Create a group and add your references to it. You can create multiple groups for different set references and projects in overleaf.
For more details, kindly refer to Overleaf Support.
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