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\def\title#1{\begin{center}#1\end{center}}

\def\author#1{\centerline{\small{\textsc{#1}}}}

\def\address#1#2{\begin{center}\small\emph{#1}\\E-mail: \texttt{#2}\end{center}}

\def\refname{{\small References}}

\begin{document}
\title{\textsc{Instructions for Producing an Abstract
 for Publication\\ in Book of Abstracts Using \LaTeX{}}}

\author{Name of Author 1, Name of Author 2}

\address{Department ..., \\  University..., \\
 Street, \\ zip code Town, Country}
{...@..., ...@...}

\author{Name of Author 3}

\address{Institute..., \\
Street, \\ zip code Town, Country}
{...@...}

\bigskip

\small

Here is the text of the abstract, up to one page.


\begin{thebibliography}{5}\footnotesize
\bibitem{ecmi}http://www.ecmi-indmath.org (Last Checked: January 25, 2010)
\bibitem{eimi}http://www.cim.pt/eimi/ (Last Checked: January 25, 2010)

\end{thebibliography}

\end{document}