Quantum phenomena in the radial thermal expansion of bundles of single-walled carbon nanotubes doped with 3He. A giant isotope effect - A. V. Dolbin; V. B. Eselson; V. G. Gavrilko; V. G. Manzhelii; N. A. Vinnikov; S. N. Popov; B. Sundqvist (Low Temperature Physics, 2011)