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\bibitem{Yuan_etal2016} {\textquotedblleft}\textit{Synthesis of IWW-type germanosilicate zeolite using 5-azonia-spiro[4, 4]nonane as structure directing agent}{\textquotedblright}. Yuan R, Claes N, Verheyen E, Tuel A, Bals S, Breynaert E, Martens J, Kirschhock CEA, New journal of chemistry \textbf{40}, 4319 (2016).   http://doi.org/10.1039/C5NJ03094C

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