\begin{quote}
This work is licensed under the terms of the Creative Commons
Attribution-ShareAlike license. The license is available at \\
- \url{http://creativecommons.org/licenses/by-sa/2.0/}.
+ \url{http://creativecommons.org/licenses/by-sa/3.0/}.
\end{quote}
}
% \end{macrocode}