TY - GEN AU - Piris,M AU - Matxain,J M AU - Ugalde,J M TI - Piris natural orbital functional study of the dissociation of the radical helium dimer SN - 1089-7690 PY - 2008///0926 N1 - Publication Type: Journal Article UR - https://doi.org/10.1063/1.2950094 ER -