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\bibitem{Fang_etal2011} {\textquotedblleft}\textit{Role of carbon and nitrogen in Fe$_{2}$C and Fe$_{2}$N from first-principles calculations}{\textquotedblright}. Fang CM, van Huis MA, Jansen J, Zandbergen HW, Physical review : B : condensed matter and materials physics \textbf{84}, 094102 (2011).   http://doi.org/10.1103/PhysRevB.84.094102

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