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\bibitem{Zhang_etal1997} {\textquotedblleft}\textit{Room temperature (2a x 2b) superstructure formed in Sr-submitted Bi$_{2}$(Sr$_{1.6}$Y$_{0.4}$)CaCu$_{2}$O$_{y}$ single crystals}{\textquotedblright}. Zhang XF, Van Tendeloo G, Hu DW, Brabers VAM, Physica: C : superconductivity \textbf{278}, 31 (1997)

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