\section{Code Distribution\label{sec:distribution}} \markboth{\textsc{MLD2P4 User's and Reference Guide}} {\textsc{\ref{sec:distribution} Code Distribution}} \noindent MLD2P4 is available from the web site \begin{quotation} \texttt{http://www.mld2p4.it} \end{quotation} where contact points for further information can be also found. To report bugs or ask general usage questions, please, send an email to \texttt{bugreport@mld2p4.it}. The software is available under a modified BSD license, as specified in Appendix~\ref{sec:license}; please note that some of the optional third party libraries may be licensed under a different and more stringent license, most notably the GPL, and this should be taken into account when treating derived works.