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Tate Wilson and Oscar E. Vilches, Helium adsorbed on carbon nanotube bundles: one-dimensional and/or two-dimensional solids? Physics in Quantum Crystals, Low Temp. Phys. 29, (2003) [Fiz. Nizk. Temp. 29, 975-979, (2003)] DOI: https://doi.org/10.1063/1.1614179.