TY  - JOUR
AU  - Pedersen, Steen
TI  - The Product of two (Unbounded) Derivations
JO  - Canadian mathematical bulletin
PY  - 1990
SP  - 345
EP  - 348
VL  - 33
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1990-058-0/
DO  - 10.4153/CMB-1990-058-0
ID  - 10_4153_CMB_1990_058_0
ER  -