%0 Journal Article %A Brown, Leon %T Invertible Elements in the Dirichlet Space %J Canadian mathematical bulletin %D 1990 %P 419-422 %V 33 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1990-068-7/ %R 10.4153/CMB-1990-068-7 %F 10_4153_CMB_1990_068_7