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\bibitem{Zhang_etal2015} {\textquotedblleft}\textit{Highly-translucent, strong and aging-resistant 3Y-TZP ceramics for dental restoration by grain boundary segregation}{\textquotedblright}. Zhang F, Vanmeensel K, Batuk M, Hadermann J, Inokoshi M, Van Meerbeek B, Naert I, Vleugels J, Acta biomaterialia \textbf{16}, 215 (2015).   http://doi.org/10.1016/j.actbio.2015.01.037

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