Niko Schwarz schrieb:
Ok, one strange thing that has happened to me a little bit too often lately
was that when quoting some literature, instead of a reference like [1]
(using natbib), i only get a question mark, like [? ].
This happens when BibTeX is not able to load the citation from your BibTeX file.
This is the case when you have loaded the wrong BibTeX file in your LyX document or more probable,
when the code in the BibTeX file is wrong.
To check the latter, have a look in LyX's menu Document-> LaTeX Log after you compiled your
document. There you'll then see error messages about missing or wrong BibTeX entries.
The classic error in this field is that you used a Unicode-only character in your BibTeX file like a
long "—" instead of a "-". The reason is that BibTeX was developed before Unicode and that
everything you write in your BibTeX file must be valid LaTeX.
When you still don't find the problem, then you can send me a _small_ example
LyX and BibTeX file.
regards Uwe
