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\bibitem{Stevens_etal2006} {\textquotedblleft}\textit{Investigation of the morphology of the mesoporous SBA-16 and SBA-15 materials}{\textquotedblright}. Stevens WJJ, Lebeau K, Mertens M, Van Tendeloo G, Cool P, Vansant EF, The journal of physical chemistry : B : condensed matter, materials, surfaces, interfaces and biophysical \textbf{110}, 9183 (2006).   http://doi.org/10.1021/jp0548725

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