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\bibitem{Cheng_etal2005} {\textquotedblleft}\textit{Production of carbon nanotubes with marine manganese nodule as a versatile catalyst}{\textquotedblright}. Cheng J-P, Zhang XB, Ye Y, Tu JP, Liu F, Tao XY, Geise HJ, Van Tendeloo G, Microporous and mesoporous materials \textbf{81}, 73 (2005).   http://doi.org/10.1016/j.micromeso.2004.11.014

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