\documentclass[a4paper,12 pt,twoside]{article}

% DO NOT MODIFY THE PREAMBLE, PLEASE!

\usepackage{amsmath,amssymb,amsthm}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\newtheorem{theorem}{Theorem}
\newtheorem{corollary}[theorem]{Corollary}
\newtheorem{lemma}[theorem]{Lemma}
\newtheorem{proposition}[theorem]{Proposition}
\newtheorem{conjecture}[theorem]{Conjecture}

\theoremstyle{definition}
\newtheorem{definition}[theorem]{Definition}
\theoremstyle{definition}
\newtheorem{remark}[theorem]{Remark}
\theoremstyle{definition}
\newtheorem{example}[theorem]{Example}

\hoffset -1in
\voffset -1in
\oddsidemargin 30mm
\evensidemargin 30mm
\textwidth 155mm
\topmargin 10mm
\headheight 10mm
\headsep 5mm
\textheight 247mm
\marginparsep 0pt
\footskip 15mm
\marginparwidth 0pt

\makeatletter
\renewenvironment{thebibliography}[1]
      {\list{\@biblabel{\@arabic\c@enumiv}}%
           {\settowidth\labelwidth{\@biblabel{#1}}%
            \leftmargin\labelwidth
            \advance\leftmargin\labelsep
            \@openbib@code
            \usecounter{enumiv}%
            \let\p@enumiv\@empty
            \renewcommand\theenumiv{\@arabic\c@enumiv}}%
      \sloppy
      \clubpenalty4000
      \@clubpenalty \clubpenalty
      \widowpenalty4000%
      \sfcode`\.\@m}
     {\def\@noitemerr
       {\@latex@warning{Empty `thebibliography' environment}}%
      \endlist}

\makeatother


\newcommand{\CSMtitle}[1]{\begin{center}\vbox{\Large \textsc{#1}}\end{center}}
\newcommand{\CSMauthor}[2]{
\begin{center}
{\large #1\\}

{\normalsize #2}
\end{center}}
\newcommand{\CSMabstract}[1]{\setcounter{equation}{0} \setcounter{theorem}{0}\normalsize #1\vspace{1.5truecm}}

% DO NOT MODIFY THE PREAMBLE, PLEASE!


\begin{document}
\pagestyle{empty}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% Here is the place for your abstract %%%
%%%           ONLY ONE PAGE!            %%%
%%% ----------------------------------- %%%

\CSMtitle{This is the Title of the Talk}  % PLEASE use English title capitalization (MLA).
% see e.g. https://proofreading.org/learning-center/what-is-title-case/

\CSMauthor{First Author, \textbf{Second Author}, Third Author}{Name of University, City, Country} 
% Please give only the affiliation of the author that is giving the talk. Please write the name of the speaker in \textbf even if there are no more authors.

\CSMabstract{
Please write your \textit{extended} abstract here. It should be at least half page but at most one page (including possible references). Please do not define your own macros. Please make sure that all label names contain your full name so that they will not be confused with the labels given by other participants.

% Optional: This is a joint work with Author Name from the University of the Author.

% If necessary: This research was supported by the Author's Grant.
	
% Optional: Feel free to give here the most important references. Please use the format below and cite all of them in the abstract!
\begin{thebibliography}{9}

% Example of cited paper.
\bibitem{SecondAuthor_BH}
\textsc{T. A. Burton, L. Hatvani}, Asymptotic stability of second order ordinary, functional, and partial differential equations,
\textit{J. Math. Anal. Appl.} \textbf{176} (1993), 261--281.

% Example of cited book.
\bibitem{SecondAuthor_Hale}
\textsc{J. K. Hale}, \textit{Theory of functional differential equations}, Applied Mathematical Sciences, Vol. 3, Springer-Verlag, New York, 1977.

\end{thebibliography}

}

%%% ----------------------------------- %%%
%%% Here is the place for your abstract %%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\end{document}