\begin{thebibliography}{KM99}

\bibitem[KL06]{MR2271477}
Anders Karlsson and Fran{\c{c}}ois Ledrappier.
\newblock On laws of large numbers for random walks.
\newblock {\em Ann. Probab.}, 34(5):1693--1706, 2006.

\bibitem[KM99]{MR1729880}
Anders Karlsson and Gregory~A. Margulis.
\newblock A multiplicative ergodic theorem and nonpositively curved spaces.
\newblock {\em Comm. Math. Phys.}, 208(1):107--123, 1999.

\end{thebibliography}