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\bibitem{Sullivan_etal2011} {\textquotedblleft}\textit{Crystallographic and magnetic characterisation of the brownmillerite Sr$_{2}$Co$_{2}$O$_{5}$}{\textquotedblright}. Sullivan E, Hadermann J, Greaves C, Journal of solid state chemistry \textbf{184}, 649 (2011).   http://doi.org/10.1016/j.jssc.2011.01.026

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