\documentclass[11pt]{article}
%
% do not exceed one page in the compiled version
% do not change the page format, font size, etc.
%
\pagestyle{empty}
%
\textwidth 13.0cm
\textheight 17.0cm
%\oddsidemargin -1.0cm
\topmargin -1.0cm
% 
\begin{document}
% 
\begin{center}
%

{\large\scshape

%%% Title
My Title}
\vspace{3mm}

%%% Authors
A. Autor$^1$, B. Autor$^2$ \\[3mm]

\noindent
{\small \em
%%% Affiliations
$^1$A. Institute \\
$^2$B. Institute
}
\end{center}
{
%%%%%%%%%%%%%%%%%%%%%
%% Abstract
This is a test abstract.
}
\end{document}