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\bibitem{Abakumov_etal2005} {\textquotedblleft}\textit{Compositionally induced phase transition in the Ca$_{2}$MnGa$_{1-x}$Al$_{x}$O$_{5}$ solid solutions: ordering of tetrahedral chains in brownmillerite structure}{\textquotedblright}. Abakumov AM, Kalyuzhnaya AS, Rozova MG, Antipov EV, Hadermann J, Van Tendeloo G, Solid state sciences \textbf{7}, 801 (2005).   http://doi.org/10.1016/j.solidstatesciences.2005.01.020

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