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\bibitem{Chang_etal2002} {\textquotedblleft}\textit{Quantum-confined magneto-Stark effect in diluted magnetic semiconductor coupled quantum wells}{\textquotedblright}. Chang K, Xia JB, Wu HB, Feng SL, Peeters FM, Applied physics letters \textbf{80}, 1788 (2002).   http://doi.org/10.1063/1.1459491

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