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\bibitem{Shi_etal1991} {\textquotedblleft}\textit{Donor transition energy in GaAs-superlattices in a magnetic field along the growth axis}{\textquotedblright}. Shi JM, Peeters FM, Hai GQ, Devreese JT, Physical review : B : condensed matter and materials physics \textbf{44}, 5692 (1991)

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