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\bibitem{Leadley_etal1993} {\textquotedblleft}\textit{High-field magnetoresistance in GaAs/Ga$_{0.7}$Al$_{0.3}$As heterojunctions arising from elastic and inelastic scattering}{\textquotedblright}. Leadley DR, Nicholas RJ, Xu W, Peeters FM, Devreese JT, Singleton J, Perenboom JA, van Bockstal L, Herlach F, Foxon CT, Harris JJ, Physical review : B : condensed matter and materials physics \textbf{48}, 5457 (1993).   http://doi.org/10.1103/PhysRevB.48.5457

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