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\bibitem{Yang_etal2010} {\textquotedblleft}\textit{B-site ordered perovskite LaSrMnNbO$_{6}$ : synthesis, structure and antiferromagnetism}{\textquotedblright}. Yang T, Perkisas T, Hadermann J, Croft M, Ignatov A, Greenblatt M, Journal of solid state chemistry \textbf{183}, 2689 (2010).   http://doi.org/10.1016/j.jssc.2010.08.041

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