@article{MS2_1972__30_166228,
     author = {Alan Hopenwasser},
     title = {Isometries on {Irreducible} {Triangular} {Operator} {Algebras.}},
     journal = {Mathematica Scandinavica},
     pages = {136--140},
     publisher = {mathdoc},
     volume = {30},
     year = {1972},
     zbl = {0239.46073},
     url = {http://geodesic.mathdoc.fr/item/MS2_1972__30_166228/}
}