%0 Journal Article %A Eugenio Ley-Koo %A Guo-Hua Sun %T Ladder operators for quantum systems confined by dihedral angles %J Symmetry, integrability and geometry: methods and applications %D 2012 %V 8 %U http://geodesic.mathdoc.fr/item/SIGMA_2012_8_a59/ %G en %F SIGMA_2012_8_a59