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\bibitem{Zha_etal2010} {\textquotedblleft}\textit{Proximity-induced pseudogap in mesoscopic superconductor/normal-metal bilayers}{\textquotedblright}. Zha G-Q, Covaci L, Zhou S-P, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{82}, 140502 (2010).   http://doi.org/10.1103/PhysRevB.82.140502

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