# Why I got weird bold numbers and characters in reference lists?

I was working on writing using latex using \documentclass[twocolumn]{svjour3}.

I got wired bold numbers and characters. For example, I used bib.file import

\RequirePackage{fix-cm}
\documentclass[twocolumn]{svjour3}          % twocolumn
\usepackage{filecontents}
\usepackage{hyperref}
%references
\begin{filecontents*}{bibi.bib}

@ARTICLE{survay,
author = {I. F. Akyildiz and W. Su and Y. Sankarasubramaniam and E.
Cayirci},
title = {Wireless sensor networks: a survey},
journal = {Computer Networks},
year = {2002},
volume = {38},
pages = {393--422}
}

@ARTICLE{VQ,
author={Y. Linde and A. Buzo and R. Gray},
journal={IEEE Transactions on Communications},
title={An Algorithm for Vector Quantizer Design},
year={1980},
volume={28},
number={1},
pages={84-95},
doi={10.1109/TCOM.1980.1094577},
ISSN={0090-6778},
month={Jan},}

\end{filecontents*}

\begin{document}
\title{XX}
\author{X X        \and
X X %etc.
}

\institute{\}
\and}
\maketitle

\begin{abstract}

\end{abstract}

\section{Introduction}
\label{intro}
\cite{survay} \cite{ESAT}.  \cite{VQ}.

\bibliographystyle{spmpsci}
\bibliography{bibi}
\end{document}


what I got is some numbers with bold shape

What should I do.

• (1) welcome, (2) howe is this related to latex3 (your tag), (3) please provide a full minimal example so we for example know how you are using this bib information, is is bibtex, biblatex etc. (4) The formatting of the entries is completely up to the style your are using (you do not write much information about this), some, but not all, writes volume in bold. – daleif Oct 11 at 10:46
• It is not completely unheard of that bibliography styles would format the volume of a journal in bold. So for the moment I would assume that everything is fine and the style works as expected. What else is weird? – moewe Oct 11 at 11:28
• I added my code – Ali Amma Oct 11 at 11:31
• Writing the volume in bold is normal in many styles. If you are writing an article you want to submit to a journal or similar, don't change the given style. – samcarter Oct 11 at 12:09