TY  - JOUR
AU  - Niels Jacob
TI  - Commutator Estimates for Pseudodifferential Operators with Negative Definite Functions as Symbols.
JO  - Forum mathematicum
PY  - 1990
SP  - 155
EP  - 162
VL  - 2
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FORUM_1990__2_3_141636/
ID  - FORUM_1990__2_3_141636
ER  -