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\bibitem{Prodi_etal2014} {\textquotedblleft}\textit{Commensurate structural modulation in the charge- and orbitally ordered phase of the quadruple perovskite (NaMn$_{3}$)Mn$_{4}$O$_{12}$}{\textquotedblright}.  Prodi A, Daoud-Aladine A, Gozzo F, Schmitt B, Lebedev O, Van Tendeloo G, Gilioli E, Bolzoni F, Aruga-Katori H, Takagi H, Marezio M, Gauzzi A;, Physical review : B : condensed matter and materials physics \textbf{90}, 180101 (2014).   http://doi.org/10.1103/PhysRevB.90.180101

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