\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 \textbf{#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!            %%%
%%% ----------------------------------- %%%


%%% ------------------------------------------------------- %%%
%%% PLEASE READ THE INSTRUCTIONS IN THE COMMENTS CAREFULLY! %%%
%%% ------------------------------------------------------- %%%


% Please use the format below! Please do not use any formatting other than what is specified.

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

\CSMauthor{Firstname Familyname}{Name of Institution, City, Country} 
% Only the speaker's name. The names of co-workers can be listed below.
% Please provide only the institution's name, e.g. only university, not department, etc.

\CSMabstract{
Please write your 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. If necessary, you may cite the most important references, e.g. \cite{SecondAuthor_BH} and \cite{SecondAuthor_Hale}. Please do not include any references not cited in the abstract, otherwise they will be deleted.

% OPTIONAL: 
\vspace{10pt}
This is a joint work with Co-worker's Name.

% If necessary: 
\vspace{10pt}
This research was supported by the Author's Grant.
	
% OPTIONAL: Most important references. Please list only the references cited in the abstract and use the format below.
\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}