# two different kinds of citations in the same document

I am using LyX with the default "article" document class. All the citations look as bracketed numbers [1], [2], etc. I want to have two different citation formats in the same document, according to the context, for example:

• "It is impossible to solve the problem exactly (Author1, Year1), however, recently an approximate solution has been suggested by Author2 (Year2)".

How can I do this?

• This can be achieved with the natbib package, and its authoryear option. You also need a natbib-compatible bibliography style, like plainnat. Then, the commands \citep{...} and \citet{...} do exactly what you want. No idea, though, how this is accomplished with LyX. – mafp Jul 5 '13 at 9:53

In LyX, go to

Document Settings > Bibliography > Natbib

Then when you go to

Insert > Citation

you can change how the citation appears by changing the Citation style box. It will give you a preview of how it will look in the PDF.

• I did this, and now all my citations look e.g. like this: "(author?) [15]" (i.e. a boldface string "author? was added... not the name of the author). This happens no matter what format I choose in Insert->Citation... – Erel Segal-Halevi Jul 7 '13 at 4:24
• Can you post a .lyx minimal example? – scottkosty Jul 7 '13 at 4:25
• Note: The bibliography itself looks fine - all authors and years appear correctly. Only the citation doesn't work. – Erel Segal-Halevi Jul 7 '13 at 4:28
• Ah, I found a solution - right-click on the bibliography, and change the "style" from "plain" to "plainnat" :) – Erel Segal-Halevi Jul 7 '13 at 4:37
• Glad it works now. For future LyX + BibTeX problems, note that LyX 2.1 should report Natbib errors. You can still see the BibTeX log in LyX by going to Document LaTeX Log and changing it to BibTeX. – scottkosty Jul 8 '13 at 2:58

See below example:

\documentclass{article}
\usepackage[authoryear]{natbib}
\begin{document}

It is impossible to solve the problem exactly \citep{au1}, however,
recently an approximate solution has been suggested by \citet{au2}.

\begin{thebibliography}{1}

\bibitem[Author1(2009)]{au1}
Author1, {\it PLE} 3(6):19--64, 2009.

\bibitem[Author2(2010)]{au2}
Author2, {\it PLE}, 4(7):119--164, 2010.
\end{thebibliography}
\end{document}