%0 Journal Article %A Alan Hopenwasser %T Isometries on Irreducible Triangular Operator Algebras. %J Mathematica Scandinavica %D 1972 %P 136-140 %V 30 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1972__30_166228/ %F MS2_1972__30_166228