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\bibitem{Leao_etal1993} {\textquotedblleft}\textit{Inter and intrasubband transitions via lo phonons in quantum wires}{\textquotedblright}. Leao SA, Hipolito O, Peeters FM, Superlattices and microstructures \textbf{13}, 37 (1993).   http://doi.org/10.1006/spmi.1993.1007

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