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\bibitem{Rosova_etal1993} {\textquotedblleft}\textit{Twin boundary structure of Au-doped YBa$_{2}$Cu$_{3}$O$_{7-x}$ single crystals}{\textquotedblright}. Rosova A, Krekels T, Van Tendeloo G, Darriet B, Chambon M, Ferroelectrics \textbf{141}, 87 (1993)

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