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\bibitem{Zhao_etal2010} {\textquotedblleft}\textit{Catalytic characterization of pure SnO$_{2}$ and GeO$_{2}$ in methanol steam reforming}{\textquotedblright}. Zhao Q, Lorenz H, Turner S, Lebedev OI, Van Tendeloo G, Rameshan C, Kl{\"o}tzer B, Konzett J, Penner S, Applied catalysis : A : general \textbf{375}, 188 (2010).   http://doi.org/10.1016/j.apcata.2009.12.027

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