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\bibitem{Ardashnikova_etal1995} {\textquotedblleft}\textit{A new way of synthesis and characterization of superconducting oxyfluoride Sr$_{2}$Cu(O,F)$_{4+\delta}$}{\textquotedblright}. Ardashnikova EI, Lubarsky SV, Denisenko DI, Shpanchenko RV, Antipov EV, Van Tendeloo G, Physica: C : superconductivity \textbf{253}, 259 (1995)

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