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Consider the following BibTeX entry:

@article{kit11,
  author = "Kit",
  title = "My article",
  journal = "2011 Journal",
  year = "2011"}

BibTeX complains:

Warning--empty author in kit11
Warning--empty title in kit11
Warning--empty journal in kit11
Warning--empty year in kit11

So, I had to change the "quotes" to {braces}.

But:
I downloaded a citation from a journal web site and copied it verbatim to my .bib file. It used "quotes" and BibTeX didn't complain at all.

Why?

UPDATE:
Here's a link from where I downloaded the citation. I used the Export citation link near the top of the page, and chose BibTeX format.

Also, in TeXShop preferences, in the Source tab, in the Encoding section in the lower right, I see Unicode (UTF-8). Could this be the problem? What would be a wise setting for this if I frequently use BibTeX?

alt text

UPDATE:
I started using BibDesk, and all those problems disappeared. To all who took the time to troubleshoot my problem, I appreciate the effort :)

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closed as too localized by Joseph Wright Feb 9 '11 at 21:41

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Could you give an example of a citation that had quotes that works? –  Seamus Jan 20 '11 at 16:37
1  
Quotes should work. I've just tried your example as the single bib entry in a file and it does work. Are you sure there are no other errors in the .bib file causing this? –  Juan A. Navarro Jan 20 '11 at 16:44
2  
Are you sure that the quotes are correct ASCII quotes? Sometimes if you copy stuff like BibTeX entries verbatim from a web browser the quotes are replaced by UNICODE quotes! Your example works fine on my machine. –  Martin Scharrer Jan 20 '11 at 17:10
1  
I have exported many references from ScienceDirect and never encountered problems (sometimes you have to make slight modifications to some of the fields, but the quotes are unproblematic). –  Philipp Jan 21 '11 at 8:38
1  
@Kit: Sorry, I misread your question. Perhaps you should post the file with the 'bad' bib entry on the internet somewhere. –  Taco Hoekwater Jan 21 '11 at 10:55

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