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\bibitem{Molnar_etal2004} {\textquotedblleft}\textit{Spin-dependent transmission through a chain of rings : influence of a periodically modulated spin-orbit interaction strength or ring radius}{\textquotedblright}. Molnar B, Vasilopoulos P, Peeters FM, Applied physics letters \textbf{85}, 612 (2004).   http://doi.org/10.1063/1.1775283

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