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\bibitem{Leadley_etal1993} {\textquotedblleft}\textit{High-field magneto-resistance in GaAs-GaAlAs heterojunctions}{\textquotedblright}. Leadley DR, Nicholas RJ, Xu W, Peeters FM, Devreese JT, Foxon CT, Harris JJ, Physica: B : condensed matter \textbf{184}, 197 (1993).   http://doi.org/10.1016/0921-4526(93)90348-A

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