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\bibitem{Molina_etal2011} {\textquotedblleft}\textit{Barrier efficiency of sponge-like La$_{2}$Zr$_{2}$O$_{7}$ buffer layers for YBCO-coated conductors}{\textquotedblright}. Molina L, Tan H, Biermans E, Batenburg KJ, Verbeeck J, Bals S, Van Tendeloo G, Superconductor science and technology \textbf{24}, 065019 (2011).   http://doi.org/10.1088/0953-2048/24/6/065019

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