Choosing the Right Citation Manager:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6013132/
Zotero 5.0 vs. EndNote X8-X9
https://guides.library.brandeis.edu/c.php?g=301723&p=2013508
Advantages and limitations of Zotero
http://zotero.pbworks.com/w/page/5511966/Advantages%20and%20Limitations%20of%20Zotero
Pros and cons of Mendeley and Zotero
https://nakhmani.wordpress.com/2011/02/02/mendeley-vs-zotero-comparison/
Oxford lib guide comparison table
https://libguides.bodleian.ox.ac.uk/c.php?g=423116&p=3851803
EndNote pros and cons
https://guides.ucsf.edu/c.php?g=101034&p=654993
Zotero pros and cons
https://guides.ucsf.edu/c.php?g=101034&p=655083
Comparison of Refworks and Zotero
https://www.lib.ncsu.edu/guides/zotero/zoterocomparison
Refworks vs. Zotero
https://libguides.rutgers.edu/c.php?g=337065&p=2268559
Refworks vs. Zotero vs. Mendeley
http://ru.za.libguides.com/c.php?g=174192
If you want ______, choose __________
https://guides.ucsf.edu/referencemanagers
AMAZING chart (of all four)
https://libguides.marquette.edu/ld.php?content_id=1308590