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\bibitem{Krstajic_etal2003} {\textquotedblleft}\textit{On the nature of ferromagnetism in diluted magnetic semiconductors : GaAs:Mn}{\textquotedblright}. Krstajic PM, Ivanov VA, Peeters FM, Fleurov V, Kikoin K, Europhysics letters \textbf{61}, 235 (2003).   http://doi.org/10.1209/epl/i2003-00224-x

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