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\bibitem{Hu_etal2018} {\textquotedblleft}\textit{Transport of hydrogen isotopes through interlayer spacing in van der Waals crystals}{\textquotedblright}. Hu S, Gopinadhan K, Rakowski A, Neek-Amal M, Heine T, Grigorieva IV, Haigh SJ, Peeters FM, Geim AK, Lozada-Hidalgo M, Nature nanotechnology \textbf{13}, 468 (2018).   http://doi.org/10.1038/S41565-018-0088-0

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