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\bibitem{Bals_etal2001} {\textquotedblleft}\textit{TEM of ultra-thin DyBa$_{2}$Cu$_{3}$O$_{7-x}$ films deposited on TiO$_{2}$ terminated SrTiO$_{3}$}{\textquotedblright}. Bals S, Rijnders G, Blank DHA, Van Tendeloo G, Physica: C : superconductivity \textbf{355}, 225 (2001).   http://doi.org/10.1016/S0921-4534(01)00034-X

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