u(2) ⊃ su*(2) ⊃ G symmetry adaptation for powers of E irreducible representations of point groups F. Michelot and M. Rey Eur. Phys. J. D, 30 2 (2004) 181-199 Published online: 22 June 2004 DOI: 10.1140/epjd/e2004-00079-1