%0 Journal Article %A Juan A. Calzada %A Javier Negro %A Mariano A. del Olmo %T Intertwining Symmetry Algebras of Quantum Superintegrable Systems %J Symmetry, integrability and geometry: methods and applications %D 2009 %V 5 %U http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a38/ %G en %F SIGMA_2009_5_a38