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\bibitem{Huve_etal1994} {\textquotedblleft}\textit{Structural and physical properties of the new superconductor Hg$_{0.5}$Pb$_{0.5}$Sr$_{4-x}$BaxCu$_{2}$(CO$_{3}$)O$_{7-\delta}$}{\textquotedblright}. Huv{\'e} M, Van Tendeloo G, Hervieu M, Maignan A, Raveau B, Physica: C : superconductivity \textbf{231}, 15 (1994).   http://doi.org/10.1016/0921-4534(94)90138-4

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