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\bibitem{Pinto_etal2018} {\textquotedblleft}\textit{Dimensional crossover and incipient quantum size effects in superconducting niobium nanofilms}{\textquotedblright}. Pinto N, Rezvani SJ, Perali A, Flammia L, Milo{\v s}evi{\'c} MV, Fretto M, Cassiago C, De Leo N, Scientific reports \textbf{8}, 4710 (2018).   http://doi.org/10.1038/S41598-018-22983-6

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