\documentclass[a5paper,12pt]{article}
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\begin{document}

\title{Title of the paper} % example: \title{Jackson-type inequalities}

\auth{First author's name $^{\dag}$, % example: I.I.~Ivanov
  \index{First author's name} % (to generate the index), example: \index{Ivanov~I.I.}
  Second author's name $^{\ddag}$ % example: P.~Petrov
  \index{Second author's name} % (to generate the index), example: \index{Petrov~P.}
}

\org{
  $^{\dag}$University (Institute) of the first author, First author's country,
  % example: St. Petersburg State University, Russia
  $^{\ddag}$University (Institute) of the second author, Second author's country
  % example: Institute of Mathematics of PAN, Poland
}

\eml{
  $^{\dag}$First author's e-mail % example: firstauthoremail@address.ru,
  $^{\ddag}$Second author's e-mail % example: secondauthoremail@address.pl
}
\addcontentsline{toc}{section}{\textit{First author's name, Second author's name}\\Title of the paper\dotfill}
% example: \textit{I.~I.~Ivanov, P.~Petrov \\Jackson-type inequalities\dotfill}

Body of the paper.

\begin{theorem}
\label{th}
Body of the theorem.
\end{theorem}
Numbered formula should be written as
\begin{equation}
\label{eq}                       % eq is any name used
2 \times 2 = 4.                    % to refer to the formula
\end{equation}
The reference to such an equation should be as \eqref{eq}.
Citations are written as \cite{Rudin}.           % Rudin is the name from
                                                  % \bibitem commands below

\begin{engbibliography}{99}

\bibitem{Rudin}
  Rudin~W., \textit{Functional Analysis, Second Edition}, McGraw-Hill, New York, 1991.
 
\bibitem{HJ}
  Han~B., Jia~R.-Q., \textit{Multivariate refinement equations and subdivision schemes,} SIAM J. Math. Anal. 29 (1998), 1177--1199.

\bibitem{Bari}
  Бари~Н.~К. \textit{Тригонометрические ряды,} Физматгиз, М., 1961.

\end{engbibliography}

\end{document}