%0 Journal Article %A Kemp, R. R. D. %T Operators on L 2(I) ⊕ Cr %J Canadian journal of mathematics %D 1987 %P 33-53 %V 39 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1987-003-1/ %R 10.4153/CJM-1987-003-1 %F 10_4153_CJM_1987_003_1