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\bibitem{Peeters_etal1994} {\textquotedblleft}\textit{Magnetopolaron effect on shallow donors in bulk and in weakly and strongly coupled superlattices}{\textquotedblright}. Peeters FM, Shi JM, Devreese JT, Physica scripta \textbf{T55}, 57 (1994).   http://doi.org/10.1088/0031-8949/1994/T55/009

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