%0 Journal Article %A Marcoux, Laurent W. %T Sums and Products of Weighted Shifts %J Canadian mathematical bulletin %D 2001 %P 469-481 %V 44 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2001-047-1/ %R 10.4153/CMB-2001-047-1 %F 10_4153_CMB_2001_047_1