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\bibitem{deKeyser_etal1995} {\textquotedblleft}\textit{Magnetotransport properties of Si-δ-doped InSb layers grown on GaAs}{\textquotedblright}. de Keyser A, Bogaerts R, van Bockstal L, Hoeks W, Herlach F, Karavolas VC, Peeters FM, van de Graaf W, Borghs G, Physica: B : condensed matter \textbf{211}, 455 (1995).   http://doi.org/10.1016/0921-4526(94)01092-F

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