\documentclass[a4paper]{jpconf}
\usepackage{graphicx}

\begin{document}
\title{
\vspace{-3cm}.\\
DD4hep: A Detector Description Toolkit \\
for High Energy Physics Experiments}

\author{
M.Frank\textsuperscript{1},
F.Gaede\textsuperscript{2},
C.Grefe\textsuperscript{1},
P.Mato\textsuperscript{1}
}

\address{\textsuperscript{1} CERN, 1211 Geneva 23, Switzerland}
\address{\textsuperscript{2} Desy, 22607 Hamburg, Germany}

\ead{Markus.Frank@cern.ch}

\begin{abstract}
\input{DD4hep-abstract.tex}
\end{abstract}

\input{DD4hep-Overview.tex}

\vspace{-0.1cm}
\section*{References}
\begin{thebibliography}{9}
\input{DD4hep-bibliography.tex}
\end{thebibliography}

\end{document}