\documentclass[9pt,a4paper]{book}

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% Scroll down to the \begin{document} to begin inserting your information
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% Talk Definitions - PLEASE DO NOT MODIFY THE FOLLOWING DEFINITIONS	%---------------------------------------------------------------------	%---------------------------------------------------------------------
\usepackage{iftex}
\ifXeTeX
  % XeLaTeX
  \usepackage{polyglossia}
  \setmainlanguage[]{english}
  \usepackage{fontspec}
\else
  % default: pdfLaTeX
  \usepackage[english]{babel}
  \usepackage[T1]{fontenc}
  \usepackage[utf8]{inputenc}
\fi
\usepackage{lmodern}


\usepackage[paperheight=210mm, paperwidth=148mm]{geometry} 
\geometry{textheight=180mm,textwidth=118mm,inner=15mm,outer=15mm, voffset=0mm}

\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{enumitem}
\usepackage[draft]{hyperref}

\pagestyle{empty}
%------------------------------------------------------
\newenvironment{emptyStruct}{}{}
\newenvironment{abst}{%
	\textbf{Abstract}\begin{emptyStruct}}{%
\end{emptyStruct}}
\newenvironment{keyw}{%
	\textbf{Keywords:}\begin{emptyStruct}}{%
\end{emptyStruct}}

\newcommand{\paperTitle}[1]{%
	\medskip
	\Large \textbf{#1}\par
	\bigskip
    \bigskip
}
\newcommand{\presenterName}[1]{%
	\small \noindent
	\underline{#1}
}
\newcommand{\presenterAffiliation}[2]{%
	\footnotesize \emph{#1}, \nolinkurl{#2} \par
	\smallskip
}
\newcommand{\coAuthorName}[1]{%
	\small \noindent
	#1
}
\newcommand{\coAuthorAffiliation}[2]{%
	\footnotesize \emph{#1}, \nolinkurl{#2} \par
	\smallskip
}
\newcommand{\paperAbstract}[1]{%
	\par \nopagebreak\noindent
	\normalsize 
	\medskip
}%paperabstract
\newcommand{\paperKeywords}[1]{%
    \bigskip
	\nopagebreak\noindent
	\begin{keyw}
		\normalsize \emph{#1}
	\end{keyw}
	\bigskip
}%paperkeywords
\newcommand{\paperRef}[1]{
\item #1
}
\newcommand{\paperReferences}[1]{%
\par\noindent\textbf{References}
\renewcommand{\theenumi}{[\arabic{enumi}]}
\renewcommand{\labelenumi}{\theenumi}
\begin{enumerate}[noitemsep,topsep=0pt]
	#1
\end{enumerate}

}%paperreferences
\newcommand{\paperAcknowledgments}[1]{%
	\vfill
	\par\noindent\textbf{Acknowledgments:}
	\normalsize #1
}%paperAcknowledgments

%------------------------------------------------------
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%------------------------------------------------------
\begin{document}
%------------------------------------------------------
%------------------------------------------------------
% TALK INFO - PLEASE MODIFY BELOW
%------------------------------------------------------
%------------------------------------------------------
\begin{center}
%%%%%%
%%%%%% TITLE OF THE TALK (MAXIMUM 130 caracters, with spaces)
%%%%%%
\paperTitle{An appealing Title is always a good start}
%%%%%%%
%%%%%%% AUTHORS
%%%%%%%
%------- AUTHORS' NAME
\presenterName{NameOfSpeaker SurnameOfSpeaker}$^1$, \coAuthorName{Coauthor1Name Coauthor1Surname}$^2$,
\coAuthorName{Coauthor2Name Coauthor2Surname}$^3$
%------- Please copy the command \coAuthorName{Coauthor2Name Coauthor2Surname} to introduce addicional co-authors, as needed.

%------- AUTHORS' Afiliation 
\medskip

$^1$\presenterAffiliation{Department, University, Country}{speaker.email@address}

$^2$\coAuthorAffiliation{Department, University, Country}{coauthor1.email@address}

$^3$\coAuthorAffiliation{Department, University, Country}{coauthor2.email@address}
%------- Please copy the command \coAuthorAffiliation{Department, University, Country}{coauthor1.email@address} to introduce addicional affiliations, as needed.
\end{center}

%%%%%%%%
%%%%%%%% ABSTRACT (max 1500 characters, including spaces)
%%%%%%%%
\medskip
\begin{center}
    \textbf{Abstract}
\end{center}
{%WRITE YOUR ABSTRACT HERE
The title and author information is immediately followed by the Abstract. The abstract should concisely summarize the talk to be presented and should not have more than 1500 characters. 

Optionally, you can include a few numbered references in the abstract but they must be manually managed (please do not use any \emph{\textbackslash{cite}} or \emph{\textbackslash{bibitem}} commands).


IMPORTANT: everything you write, from the title to the keywords, including references and acknowledgments, must fit on one page.

... and that's it!
}% end paperAbstract


%%%%%%%%
%%%%%%%% KEYWORDS (max 5 keywords)
%%%%%%%%
\paperKeywords{Keyword1, Keyword2, Keyword3 (use up to 5 keywords)}% end paperKeywords

\paperReferences{
	\paperRef{Reference one}
	\paperRef{Reference two}
}

\paperAcknowledgments{Use only when you need to acknowledge your research.}% end paperAcknowledgments

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\end{document}