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\fancyhead[L]{\footnotesize{Divulgaciones Matem\'aticas Vol. XX No. X 
(20XX), pp. \pageref{begin-art}--\pageref{end-art}}}%
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\begin{document}
\label{begin-art}
\pagestyle{headings}
\thispagestyle{plain} 
\footnote{\hspace{-18.1pt} Received ***. Revised ***.
Accepted ***. \\ MSC (2000): Primary ***; Secondary ***.}
\selectlanguage{english}
\begin{center}
{\LARGE\bfseries ***Title*** \par }

\vspace{5mm}
{\large\slshape ***title in Spanish***}\\[3mm]
{\large ***author*** (\url{@})}\\[1mm]
***Institucional***\\
***Address***
\end{center}

\begin{abstract}

{\bf Key words and phrases:} 
\end{abstract}

\selectlanguage{spanish}
\begin{abstract}

{\bf Palabras y frases clave:} 
\end{abstract}

\selectlanguage{english}
\section{Introduction}

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%\section{Acknowledgements}

\begin{thebibliography}{99}
% Example book:
% \bibitem{Ci} Ciarlet, P. {\em The finite element method for elliptic
% problems}, North-Holland, Amsterdam, 1980.
% Example paper:
% \bibitem{Tong} Tong, J. \emph{On decomposition of continuity in 
% topological spaces}, Acta Math. Hung., \textbf{54}(1989), 51--55.
\end{thebibliography}

\label{end-art}
\end{document}