%0 Journal Article %A Tam, P. K. %T On the Unitary Equivalence of Certain Classes of Non-Normal Operators. I %J Canadian journal of mathematics %D 1971 %P 849-856 %V 23 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-095-9/ %R 10.4153/CJM-1971-095-9 %F 10_4153_CJM_1971_095_9