\addcontentsline{toc}{section}{Bibliographie}
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{\em Analyse fonctionnelle}, Masson, Paris, $1983$.
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{\em Ordinary differential equations, transport theory ans Sobolev
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B.Desjardins,
{\em A few remarks on ordinary differential equations}, Comm.Partial
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L.Paquet,
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F.Poupaud, M.Rascle,
{\em Measure solutons to the linear multi-dimensionnal transport
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K.Yosida,
{\em Functional Analysis}, Springer, $1965$.
\end{thebibliography}
