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\bibitem{Abakumov_etal1998} {\textquotedblleft}\textit{Effects of fluorination on the structure and superconducting properties of Y2Ba4Cu7O14+ phases}{\textquotedblright}. Abakumov A, Rozova M, Shpanchenko R, Kovba M, Putilin S, Antipov E, Lebedev O, Van Tendeloo G, Kopnin E, Karpinski J, Physica: C : superconductivity \textbf{301}, 155 (1998).   http://doi.org/10.1016/S0921-4534(98)00108-7

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