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\bibitem{Chen_etal2012} {\textquotedblleft}\textit{Superconducting nanofilms : molecule-like pairing induced by quantum confinement}{\textquotedblright}. Chen Y, Shanenko AA, Perali A, Peeters FM, Journal of physics : condensed matter \textbf{24}, 185701 (2012).   http://doi.org/10.1088/0953-8984/24/18/185701

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