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\bibitem{Cassiers_etal2003} {\textquotedblleft}\textit{A counterion-catalyzed (S$^{0}$H$^{+}$)(X$^{-}$I$^{+}$) pathway toward heat- and steam-stable mesostructured silica assembled from amines in acidic conditions}{\textquotedblright}. Cassiers K, van der Voort P, Linssen T, Vansant EF, Lebedev O, van Landuyt J, The journal of physical chemistry : B : condensed matter, materials, surfaces, interfaces and biophysical \textbf{107}, 3690 (2003).   http://doi.org/10.1021/jp026696v

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