\documentclass[10pt,aspectratio=43]{beamer}
\usetheme[sectionpages]{UniNA}

\begin{filecontents}{\jobname.bib}
@article{A2012,
author = {Author, A},
title = {An interesting paper},
journal = {Journal},
year = {2012},
volume = {2},
pages = {70--76},
}
@article{B2012,
author = {Buthor, B},
title = {An also interesting paper},
journal = {Journal},
year = {2012},
volume = {2},
pages = {77--79},
}
\end{filecontents}

\addbibresource{\jobname.bib}

\begin{document}

\begin{frame}{Outline}
   \tableofcontents
\end{frame}

\begin{frame}
   \textcite{A2012}
\end{frame}

\appendix

\begin{frame}[t,allowframebreaks]
   \frametitle{Bibliography}
   \printbibliography[heading=none]
\end{frame}

\end{document}