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Hi, thanks for the quick response! This references were working well with another LateX template. So I hope that it can be set to work well again...

The content of the .bib file is:

% This file was created with JabRef 2.10.
% Encoding: UTF8

@Book{antoulas2005approximation,
Title ...

Hi, I am having problems in the references section. When I reference books, the references are created correctly but when I reference articles, the name of the article does not appear. (please see attached figure)

Please also see below how references are added to JabRef 2.10.

@Book ...

Thank you very much. It worked perfectly

Hi, I´m trying to add figures using the following code:

\begin{figure*}
\begin{center}
\caption{this is a caption} \label{exemple_01}
\includegraphics[scale=0.3]{exemple_01.png}
\end{center}
\end{figure*}

but it does not work. Can anyone help me?
The error message is:

! Undefined control ...