\documentclass{article}
\pagestyle{plain}


\usepackage{graphicx}
% \usepackage{amssymbol}
\usepackage[latin1]{inputenc}
\usepackage{amssymb}
\usepackage{color}

\begin{document}

\setcounter{page}{1}
\begin{center}
{\Large \bf Title of the talk }
\end{center}

\begin{center}
\underline{%Speaker 
FirstName1, LastName1}$^{1, *}$,  
%Other autors
FirstName2 LastName2$^{2}$ \\
$^1$  Institution, Country, $^*$\texttt{e-mail@adress} \\
$^2$ Institution,  Country \\

\end{center}

\begin{abstract}
The text of the abstract \cite{1}, \cite{2} and \cite{3}.  
 \end{abstract}


\begin{thebibliography}{1}

%The article style
\bibitem{1} {LastName1 F1.\,M1., LastName2 F2.\,M2.,} {``The title of the article 
in the journal,'' Journal, \textbf{6}, No. 10, 6--10 (year).}

%The book style
\bibitem{2} {LastName1 F1.\,M1.,} {The Title of the Book, Publisher, City (year).}

%The article style in the book
\bibitem{3}  {LastName1 F1.\,M1.,} 
{``The title of the article in the book,'' in: The Title of the Book, 
Publisher, City, year, pp.~6--10.}

\end{thebibliography}

\end{document}
% ------------------------------------------------------------------------



