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\bibitem{Lenaerts_etal1995} {\textquotedblleft}\textit{FT-IR characterization of tin dioxide gas sensor materials under working conditions}{\textquotedblright}. Lenaerts S, Roggen J, Maes G, Spectrochimica acta: part A: molecular and biomolecular spectroscopy \textbf{51}, 883 (1995).   http://doi.org/10.1016/0584-8539(94)01216-4

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