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\bibitem{Abakumov_etal2014} {\textquotedblleft}\textit{Multiple twinning as a structure directing mechanism in layered rock-salt-type oxides : NaMnO$_{2}$ polymorphism, redox potentials, and magnetism}{\textquotedblright}. Abakumov AM, Tsirlin AA, Bakaimi I, Van Tendeloo G, Lappas A, Chemistry of materials \textbf{26}, 3306 (2014).   http://doi.org/10.1021/cm5011696

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