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\bibitem{Croitoru_etal2011} {\textquotedblleft}\textit{Parity-fluctuation induced enlargement of the ratio \Delta$_{E}$/k$_{B}$T$_{c}$ in metallic grains}{\textquotedblright}. Croitoru MD, Shanenko AA, Peeters FM, Axt VM, Physical review : B : condensed matter and materials physics \textbf{84}, 214518 (2011).   http://doi.org/10.1103/PhysRevB.84.214518

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