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\bibitem{Saraiva_etal2009} {\textquotedblleft}\textit{Influence of Al content on the properties of MgO grown by reactive magnetron sputtering}{\textquotedblright}. Saraiva M, Chen H, Leroy WP, Mahieu S, Jehanathan N, Lebedev O, Georgieva V, Persoons R, Depla D, Plasma processes and polymers \textbf{6}, S751 (2009).   http://doi.org/10.1002/ppap.200931809

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