TY - JOUR AU - Kemp, R. R. D. TI - Operators on L 2(I) ⊕ Cr JO - Canadian journal of mathematics PY - 1987 SP - 33 EP - 53 VL - 39 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1987-003-1/ DO - 10.4153/CJM-1987-003-1 ID - 10_4153_CJM_1987_003_1 ER -