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\bibitem{Malakho_etal2006} {\textquotedblleft}\textit{Enhancement of second harmonic generation signal in thermally poled glass ceramic with NaNbO$_{3}$ nanocrystals}{\textquotedblright}. Malakho A, Fargin E, Lahaye M, Lazoryak B, Morozov V, Van Tendeloo G, Rodriguez V, Adamietz F, Journal of applied physics \textbf{100}, 063103 (2006).   http://doi.org/10.1063/1.2259816

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