\begin{frame}[allowframebreaks,noframenumbering]
	%    \frametitle{منابع}
%\printbibliography
\begin{latin}
\bibliographystyle{IEEEtr} % ieeetr-plain=unsrt
\scriptsize
\setLTRbibitems
\bibliography{REF}
\nocite{*} % to add all reference in bib
\end{latin}
\end{frame}