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\bibitem{Wang_etal2002} {\textquotedblleft}\textit{Ballistic spin transport through electronic stub tuners : spin precession, selection, and square-wave transmission}{\textquotedblright}. Wang XF, Vasilopoulos P, Peeters FM, Applied physics letters \textbf{80}, 1400 (2002).   http://doi.org/10.1063/1.1455146

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