What are good sites to find citations in BibTex format?
Here's my compilation of the suggestions given. Feel free to edit other suggestions in as appropriate, in addition to posting each suggestion in a separate answer. Note that this list is manually updated, and may not include all the other answers that have been posted! If you find some other answer helpful, please upvote it as well.
General-purpose reference collections that provide BibTeX citations
- ZoteroBib
- doi2bib
- Bibsonomy
- BibTeX Search
- Amazon
- Google Scholar
- Nelson Beebe's collection
- Citebay
Subject-specific collections that provide BibTeX citations
- MathSciNet (math) (Freely available via MRef)
- ACM catalog (CS)
- IEEE catalog (engineering/technical)
- Collection of CS Bibliographies (computer science)
- DBLP (math/CS)
- SPIRES (high-energy physics)
- Citing Wikipedia itself
- TeXMed, of PubMed (medicine, biology, bioinformatics)
- PhilPapers (philosophy, related disciplines)
- Stanford Encyclopedia of Philosophy (as it says on the tin)
- Astrophysics Data System (astronomy and physics)
- Ideas/RePEc (economics)
Reference managers that allow BibTeX export/import
- Bibliophile for converting from other formats
- JabRef
- Mendeley
- Qiqqa - has a 'BibTeX Sniffer' wizard and auto-association of BibTeX with PDFs
- Zotero (Firefox extension)
- KBibTeX
MathSciNet a subscription only service (but available on most university campuses) provides BIBTEX entries for the entire mathematical literature.
A nice aspect of their interface is a "clipboard", to which you can save articles, then ask for the BIBTEX for everything on your clipboard all at once.
Mathematicians might also be interested in the shell scripts I wrote that automatically look up BIBTEX entries from MathSciNet, based on missing references in your .aux
files.
For books I usually use a site, where it is possible to get Bibtex citations from Amazon.com articles. This is very good for books, and some inproceedings and incollections might be found here as well.
Amazon: http://lead.to/amazon/en/
As a Software Engineer I quite often have to deal with technical papers from ACM or IEEE. Both their catalogs provide Bibtex export capabilities.
ACM: http://portal.acm.org
IEEE: http://ieeexplore.ieee.org