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\bibitem{Gao_etal2007} Gao JR, Hajenius M, Tichelaar FD, Klapwijk TM, Voronov B, Grishin E, et al. Monocrystalline NbN nanofilms on a 3C-SiC/Si substrate. Appl Phys Lett. 2007;91(6):062504 (1 to 3).

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