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\bibitem{Verbist_etal1994} {\textquotedblleft}\textit{TEM study of YBa$_{2}$Cu$_{3}$O$_{7-x}$ thin films with Zn and Fe}{\textquotedblright}. Verbist K, Van Tendeloo G, Ye M, Mehbod M, Deltour R, Physica: C : superconductivity \textbf{235}, 663 (1994).   http://doi.org/10.1016/0921-4534(94)91555-5

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