# References citation does not go in a new line [duplicate]

An image is more expressive then words...

How you can see, the citation of a \bibitem does not go in a new line. This is my code:

\begin{thebibliography}{99}
\bibitem[Documentazione ffmpeg x x x x x x x x x x x x]{ffmpegdoc}
Descrizione progetto ffmpeg\\
\end{thebibliography}


and then

\cite{ffmpegdoc}


all that "x" is just for extremes the problem

Any idea in what's the problem?

\usepackage{breakcites}