%0 Journal Article %A Guillory, Carroll %T A Characterization of a Sparse Blaschke Product %J Canadian mathematical bulletin %D 1989 %P 385-390 %V 32 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1989-056-0/ %R 10.4153/CMB-1989-056-0 %F 10_4153_CMB_1989_056_0