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\bibitem{Peng_etal2010} {\textquotedblleft}\textit{Preparation of sulfonated ordered mesoporous carbon and its use for the esterification of fatty acids}{\textquotedblright}. Peng L, Philippaerts A, Ke X, van Noyen J, de Cleppel F, Van Tendeloo G, Jacobs PA, Sels BF, Catalysis today \textbf{150}, 140 (2010).   http://doi.org/10.1016/j.cattod.2009.07.066

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