\documentclass[a4paper,twoside]{article}

\begin{document}

\title{Instructions for Preparing an Extended Abstract}

\author{\bf Name Surname and Second author \\
\it Address\\
E-mail: xyz@mail.server}

\date{}

\maketitle


    \section{Introduction}
    The length of text should be no more than two pages. You can delete our sample text and replace it with your own
contribution. Equations should be centered and numbered
consecutively,
       \begin{equation}
    \label{eq:myeq1}
    \int_{Q_p}\chi_p(\alpha x^2+\beta x)dx=
\lambda_p(\alpha)|2\alpha|_p^{-1/2} \chi_p \left(
-{\beta^2\over4\alpha} \right), \enskip\alpha\neq 0,
       \end{equation}
 as in Eq.~(\ref{eq:myeq1}).

    \section{Conslusion}

 Footnotes are denoted by a character superscript
in the text\footnote{Just like this one.}. Citations in the text
use the labels defined in the bibitem declaration, for example
\cite{vvz}, \cite{brek} or \cite{proc}.

    \begin{thebibliography}{99}
       \bibitem{vvz} V. S. Vladimirov, I. V. Volovich and E. I Zelenov, {\it p-Adic
Analysis and Mathematical Physics}, World Scientific, Singapore,
1994

\bibitem{brek}
L. Brekke and P. G. O Freund, {\it Phys. Rep.} {\bf 233} (1993) p.
1


\bibitem{proc} G.\,S. Djordjevic and Lj. Nesic, "Real and p-adic aspects of quantization of tachyons", in {\it Proceedings of the Workshop
Mathematical, Theoretical and Phenomenological Challenges Beyond
the Standard Model: Perspectives of the Balkan Collaborations},
edited by G.~S. Djordjevic, Lj. Nesic and J. Wess (World
Scientific, Singapure, 2005), pp. 197--207.


    \end{thebibliography}
    \end{document}
