LATEX: FootNote with figure

Some days ago I had to write a paper in latex,
during this work I found a problem with the footnote of a figure. After some time I found this solution for this problem

...LATEX TEXT...

\begin{figure}
\centering
\epsfig{file=images/Image, height=130px, width=230px}
\caption[view-based]{A view-based integration system. \footnotemark}
\end{figure}

\end{description}

\footnotetext{http://en.wikipedia.org/wiki/File:Dataintegration.png}

...LATEX TEXT...

It is important to write the footnotetext before a new footnote is defined.
footnotemark is the "marker" for the footnote we are going to add immediately after.