# Multiple chapters

```Hi all,
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I'm writing my thesis with Lyx and I'm organizing it in several chapters and a bibliography.
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Every chapter have reference to the same bibliography but to cite bibliography entries I must include bibliography (generated by bibtex using referencer) in every chapter! By this way I have several bibliography in my output and obviously I don't need it.
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What can I do to cite bibliography entries without printing them at the end of every chapter?
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I did also read the "extended feature" chapter of the Lyx guide. It suggest to include these strings in the preamble|:
```||\usepackage{comment}

\includecomment{comment}

but isn't working anyway.

Thank you all
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