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\bibitem{Zeng_etal2015} {\textquotedblleft}\textit{Co-Rich ZnCoO Nanoparticles Embedded in Wurtzite Zn1-xCoxO Thin Films: Possible Origin of Superconductivity}{\textquotedblright}. Zeng Y-J, Gauquelin N, Li D-Y, Ruan S-C, He H-P, Egoavil R, Ye Z-Z, Verbeeck J, Hadermann J, Van Bael MJ, Van Haesendonck C, ACS applied materials and interfaces \textbf{7}, 22166 (2015).   http://doi.org/10.1021/acsami.5b06363

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