TY  - JOUR
AU  - J.T. Marti
TI  - Operational Calculus for Two Commuting Closed Operators.
JO  - Commentarii mathematici Helvetici
PY  - 1968
SP  - 87
EP  - 97
VL  - 43
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1968__43_139354/
ID  - CMH_1968__43_139354
ER  -