# How can I change my Bibliography to enumerate the supplemental references like [S1], [S2],…,instead of [1],[2],

I'm writing a scientific paper, using \documentclass[aps,prl,...]{revtex4-1} with supplemental Material. The Supplemental Material is an extra tex file and I want that the references there to be numbered like [S1],[S2],... I'm using \bibliographystyle{apsrev4-1}. Is there any way doing it like this?

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Welcome to TeX.SE! Do you want to create a separate bibliography for the supplemental materials, or should the [S.] entries be listed alongside the other entries in the main bibliography? –  Mico Aug 14 '12 at 11:09
I want to create a new .bib file. –  Florian Aug 14 '12 at 11:40
Florian -- I think @Mico was asking something slightly different. He wants to know whether the '[S<num>]' entries should appear in the same printed bibliography as the regular '[<num>]' entries, not whether they will be in a separate bibliography database (i.e., a new .bib file). That is, will the document contain one bibliography or two? –  jon Aug 14 '12 at 14:42
Sorry, maybe my descriptioin wasn't clear enough. The supplemental material will be an extra tex file, which has it's own references and thus it's own seperate bib-file. I just want the references in the SM to be numbered like [Sx] instead if [x]. –  Florian Aug 14 '12 at 15:24

As REVTeX uses natbib, you can use the mechanisms provided by that package to make this change

\begin{filecontents}{\jobname.bib}
@article{demo,
author  = "Other, A. N.",
journal = "J. Irrep. Res.",
year    = 2012,
pages   = "1-10",
volume  = "200"
}
\end{filecontents}
\documentclass[aps,prl]{revtex4-1}
\bibliographystyle{apsrev4-1}
\renewcommand*{\citenumfont}[1]{S#1}
\renewcommand*{\bibnumfmt}[1]{[S#1]}
\begin{document}
\cite{demo}
\bibliography{\jobname}
\end{document}


(I do something similar in achemso).

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Thanks for the help! That solved the problem. –  Florian Aug 17 '12 at 17:53
@Florian -- Best to accept the answer and thereby mark it as 'solved'. –  jon Aug 17 '12 at 18:43