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\bibitem{He_etal2011} {\textquotedblleft}\textit{Vertically oriented nickel nanorod/carbon nanofiber core/shell structures synthesized by plasma-enhanced chemical vapor deposition}{\textquotedblright}. He Z, Lee CS, Maurice J-L, Pribat D, Haghi-Ashtiani P, Cojocaru CS, Carbon \textbf{49}, 4710 (2011).   http://doi.org/10.1016/j.carbon.2011.06.075

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