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\bibitem{Leroux_etal2011} {\textquotedblleft}\textit{Ultrastructure and composition of cell wall appositions in the roots of \textbf{Asplenium} (Polypodiales)}{\textquotedblright}. Leroux O, Leroux F, Bagniewska-Zadworna, Knox JP, Claeys M, Bals S, Viane RLL, Micron \textbf{42}, 863 (2011).   http://doi.org/10.1016/j.micron.2011.06.002

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