%0 Journal Article %A Lopes, Samuel A. %T Separation of Variables for %J Canadian mathematical bulletin %D 2005 %P 587-600 %V 48 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2005-054-8/ %R 10.4153/CMB-2005-054-8 %F 10_4153_CMB_2005_054_8