\begin{thebibliography}{2}
\expandafter\ifx\csname
natexlab\endcsname\relax\def\natexlab#1{#1}\fi
\expandafter\ifx\csname url\endcsname\relax
  \def\url#1{{\tt #1}}\fi

\bibitem{1}
Baruch Awerbuch and Yossi Azar and Amos Fiat and Tom Leighton, "Making commitments in the face of uncertainty: how to pick a winner almost every time (extended abstract)",
ACM, 1996
\end{thebibliography}
