\documentclass[11pt,a5]{article}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\usepackage[utf8]{inputenc}

\usepackage[top = 25mm, bottom = 25mm, left = 30mm, right = 20mm, a4paper]{geometry}

\usepackage{hyperref}

\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{amsmath}
\usepackage{amsthm}

\usepackage[none]{hyphenat}

\usepackage{soul}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\sloppy

\begin{center}

    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %%% TITLE 
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

    {\bf\Large Title }

    \vspace{10 pt}

    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    %%% AUTHORS
    %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
    
    {\large First Author, Second Author and Third Author}

\end{center}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% TEXT OF ABSTRACT
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Text of an abstract\ldots

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% LITERATURE/REFERENCES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{thebibliography}{9}

    \bibitem{Hilbert} D. Hilbert, \textit{Probl{\`e}mes math{\'e}matiques}, Ens. math. 2, 349--354 (1900) % ARTICLE

    \bibitem{Evans} L. Evans, \textit{Partial differential equations. 2nd ed.}, Graduate Studies in Mathematics 19, xxi, 749 p. (2010) % BOOK

\end{thebibliography}

\begin{tabular}{rl}
    \textbf{First Author:} & Name, Surname \\ 
    \textbf{Affiliation:} & \textit{Departament/Institution, University}\\
     & \textit{Postcode, Country} \\
    \textbf{e-mail:} & \texttt{email@adress.p.lodz.pl}\\
     & \\
    \textbf{Second Author:} & Name, Surname \\ 
    \textbf{Affiliation:} & \textit{Departament/Institution, University}\\
     & \textit{Postcode, Country} \\
    \textbf{e-mail:} & \texttt{email@adress.p.lodz.pl}\\
     & \\
    \textbf{Third Author:} & Name, Surname \\ 
    \textbf{Affiliation:} & \textit{Departament/Institution, University}\\
     & \textit{Postcode, Country} \\
    \textbf{e-mail:} & \texttt{email@adress.p.lodz.pl}\\
\end{tabular}

\end{document}