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\bibitem{Zhang_etal2013} {\textquotedblleft}\textit{A nanoscale shape memory oxide}{\textquotedblright}.  Zhang J, Ke X, Gou G, Seidel J, Xiang B, Yu P, Liang WI, Minor AM, Chu Yh, Van Tendeloo G, Ren X, Ramesh R;, Nature communications \textbf{4}, 2768 (2013).   http://doi.org/10.1038/ncomms3768

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