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\bibitem{Foeldi_etal2006} {\textquotedblleft}\textit{Quantum rings as electron spin beam splitters}{\textquotedblright}. F{\"o}ldi P, K{\'a}lm{\'a}n O, Benedict MG, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{73}, 155325 (2006).   http://doi.org/10.1103/PhysRevB.73.155325

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