I usually include references in my beamer-presentation like this:
\begin{frame}
\frametitle<presentation>{References}
\bibliographystyle{acm}
\nocite{A}
\nocite{B}
\nocite{C}
\setbeamertemplate{bibliography item}[text]
\bibliography{../sources}
\end{frame}
However, for a talk I am going to give, I would prefer to have the two most important papers at the beginning (first references slide), followed by a second slide with the rest of the references. How can I achieve this WITHOUT writing everything myself using bibtex?
biblatex, using keywords to differentiate between "important" and others. See this answer – cslstr Mar 27 '14 at 17:27