# Repeated references with multibib

I am trying to cite multiple references, sorted by reference type (journal vs. conference). Some of the journal references cite the corresponding conference paper where the results originally appeared.

However, when I cite the conference paper in the journal reference, the conference paper bibliographic details re-appear in the journal bibliography, like so:

[J1] Blah blah. Journal paper. Extended version of [C1].

[J2] Blah blah. Conference paper.

[C1] Blah blah. Conference paper.

I only want the citation (eg. [C1]) and not the repeated reference (eg. [J2]).

Below is a MWE of my document code.

.tex file

% !TEX TS-program = pdflatexmk
\documentclass{article}

\usepackage[resetlabels, labeled]{multibib}

\newcites{%
J,%
C%
}%
{%
Journal Articles,%
Conference Articles%
}

\begin{document}

\nociteJ{DoeKnuthJournal}
\nociteC{DoeKnuthConference}

\bibliographystyleJ{unsrt}
\bibliographystyleC{unsrt}

\bibliographyJ{./Publications}
\bibliographyC{./Publications}

\end{document}


.bib file

@article{
DoeKnuthJournal,
author  =   "Doe, John and Knuth, Donald",
title   =   "A really good paper",
journal =   "Journal of Good Papers",
note    =   "Extended version of GP 2000 article \cite{DoeKnuthConference}",
}

@inproceedings{
DoeKnuthConference,
author  =   "Doe, John and Knuth, Donald",
title   =   "A really good paper",
booktitle = "Proceedings of Good Papers (GP 2000)",
}


Try splitting the bib file into two files, one for journals and one for conferences:

.tex file:

\documentclass{article}

\usepackage[resetlabels, labeled]{multibib}

\newcites{%
J,%
C%
}%
{%
Journal Articles,%
Conference Articles%
}

\begin{document}

\nociteJ{DoeKnuthJournal}
\nociteC{DoeKnuthConference}

\bibliographystyleJ{unsrt}
\bibliographystyleC{unsrt}

\bibliographyJ{PublicationsJ}
\bibliographyC{PublicationsC}

\end{document}


PublicationsJ.bib:

@article{
DoeKnuthJournal,
author  =   "Doe, John and Knuth, Donald",
title   =   "A really good paper",
journal =   "Journal of Good Papers",
note    =   "Extended version of GP 2000 article \cite{DoeKnuthConference}",
}


PublicationsC.bib:

@inproceedings{
DoeKnuthConference,
author  =   "Doe, John and Knuth, Donald",
title   =   "A really good paper",
booktitle = "Proceedings of Good Papers (GP 2000)",
}


This is somewhat unsatisfying, because it would be nice if you can leave all the references in the same bib file, but this seems to be a known limitation of multibib; see Section 1.3 of the documentation.