\documentclass[11pt,a4paper]{article}
\usepackage{graphicx}
\renewcommand{\refname}{ }

\pagestyle{empty}

\topmargin=0cm
\headheight=0cm
\headsep=0cm
\oddsidemargin=0.5cm
\setlength{\textwidth}{15cm}
\setlength{\textheight}{24cm}

\begin{document}

\begin{center}
{\large \bf
Title of the contribution
}
\end{center}

\begin{flushleft}
\underline{Presenting Author}$^{1}$, First Coauthor$^{2}$, Second Coauthor$^{2}$, ...
\end{flushleft}


\begin{flushleft}
$^{1}$\textit{Institution, Address, ZIP code Town, Country}
\\
$^{2}$\textit{Institution, Address, ZIP code Town, Country}
\end{flushleft}
\vspace{0.4cm}

The abstract, including the heading, all the figures and references cannot exceed one page produced using this template.

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\begin{figure}[hb]
\begin{center}
\includegraphics[width=7cm]{example-image-a}
\caption{Caption of the figure}
\end{center}
\end{figure}

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\begin{equation}
\int_a^b f'(x)\mathrm{d}x=f(a)-f(b)
\end{equation}

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\begin{thebibliography}{2}
\vspace{-1cm}
\bibitem{cite1} Name1, Name2, \textsl{et al.}, Journal {\bf vol} (year) page.
\bibitem{cite2} Name1, Name2, Journal {\bf vol} (year) page.
\end{thebibliography}

\end{document}