\begin{thebibliography}{1}

\bibitem{Miln}
J.S. Milne.
\newblock {\em Etale Cohomology}.
\newblock Princeton Univ. Press, Princeton, NJ, 1980.

\bibitem{MV}
F.~Morel and V.~Voevodsky.
\newblock Homotopy category of schemes over a base.
\newblock {\em Preprint}, 1996.

\bibitem{MC}
V.~Voevodsky.
\newblock The {M}ilnor {C}onjecture.
\newblock {\em Max-Planck Inst. preprint series}, 1997.

\bibitem{talk}
V.~Voevodsky.
\newblock The {$\af$}-homotopy theory.
\newblock In {\em Proceedings of the international congress of mathematicians},
  Berlin, 1998.

\end{thebibliography}