When preparing a presentation in Latex using the Beamer document class, standard usage replaces page numbers with their own icons in the reference page. To display classic numbered references instead, if we want, we can see that the problem is solved by writing the relevant slide in the following way. I have shown the added line to the standard …

script.tex

\begin{frame}[allowframebreaks]{Bibliography}
\setbeamertemplate{bibliography item}[text]
\bibliographystyle{IEEEbib}
\bibliography{Bibliography}
\end{frame}