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A.V. Dolbin, V.B. Esel`son, V.G. Gavrilko, V.G. Manzhelii, N.A. Vinnikov, S.N. Popov, and B. Sundqvist, Quantum phenomena in the radial thermal expansion of bundles of single-walled carbon nanotubes doped with 3He. A giant isotope effect, Low Temp. Phys. 37, (2011) [Fiz. Nizk. Temp. 37, 685-687, (2011)] DOI: https://doi.org/10.1063/1.3624780.