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\bibitem{Lemmens_etal1999} {\textquotedblleft}\textit{Microstructure and phase transitions in Pb(Sc$_{0.5}$Ta$_{0.5}$)O$_{3}$}{\textquotedblright}. Lemmens H, Richard O, Van Tendeloo G, Bismayer U, Journal of electron microscopy \textbf{48}, 843 (1999).   http://doi.org/10.1093/oxfordjournals.jmicro.a023756

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