Structures, Energetics, and Dynamics of Helium Adsorbed on Isolated Fullerene Ions - Leidlmair C, Wang Y, Bartl P, Schöbel H, Denifl S, Probst M, Alcamí M, Martín F, Zettergren H, Hansen K, Echt O, Scheier P (Physical Review Letters, 2012)