\documentclass[12pt]{amsart}
\usepackage{amsthm,amsfonts,amsmath,amssymb,amsaddr,geometry}
\geometry{margin=2cm,right=2.5cm}
\usepackage{url}

\begin{document}


\title{Template}
\author{Author$^1$, Author$^{2,*}$}
\maketitle

\begin{center}
{
\footnotesize $^1$Department of Mathematics, University, Country\\
$^2$Department of Mathematics, University, Country\\
$^*$Corresponding author: your email address\\
Received Jan. 1, 2019
}
\end{center}


\begin{abstract}
This is a sample latex document with emphasis on using math mode and
equation environments. You should use it as a template for your paper. Any references cited in the abstract must be given in full.

\noindent 2020 Mathematics Subject Classification. 00000; 00000.

\noindent Key words and phrases. mathematics; Asia pacific.
\end{abstract}

\vspace{10mm}

\section{Introduction}
This is a sample latex document with emphasis on using math mode and
equation environments.  You should use it as a template for your paper \cite{ref1}. Ensure that every reference present in the reference list is cited in the text. Unpublished results are not recommended in the reference list. Please cite all references by \cite{}. 

\section*{Authors' Contributions}

All authors have read and approved the final version of the manuscript. The authors contributed equally to this work.

%The authors contributed to this work in the following ways:
%\begin{itemize}
%	\item {Author A:} 
%	\item {Author B:}
%\end{itemize}

\section*{Conflicts of Interest}
The authors declare that there are no conflicts of interest regarding the publication of this paper.

\begin{thebibliography}{99}

\bibitem{ref1} A. Name, Paper Title, Asia Pac. J. Math. 1 (2013), 1-10. \url{https://doi.org/00.00000/0000}.

\bibitem{ref2} A. Name, Book Title, Press, City, 2013.

\end{thebibliography}

\end{document}
